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    Home » Recipes » Italian Appetizers

    Marinated Eggplant and Onion

    Published: May 11, 2023 · Modified: Jun 7, 2025 by Vinny · This post may contain affiliate links · 1 Comment

    Jump to Recipe Print Recipe

    A perfect topping for toast or a sandwich, Marinated Eggplant and Onion, is an easy way to upgrade anything on bread! It's so delicious and can be stored for your sandwiches all week.

    Marinated eggplant on toast with ricotta.

    Looking for more delicious toppings? Try our Avocado Lime Crema, EASY Ricotta Bruschetta, or Mascarpone Toast with Lox.

    Jump to:
    • Why this Recipe?
    • Substitutions and Ingredient Notes
    • How to Make Marinated Eggplant and Onion
    • Pro-Tips
    • What to Serve Marinated Eggplant and Onion with
    • Recipe FAQs
    • More Amazing Sides!
    • 📖 Recipe
    • Reviews

    Why this Recipe?

    1. It's an easy way to make a healthy and delicious topping for sandwiches, toast, or crackers.
    2. It uses fresh seasonal ingredients that you can source locally
    3. It stores well in the fridge and it's a great make-ahead option for weekdays!
    4. The flavors only get richer and more delicious as the eggplant and onions marinate during the week!

    Substitutions and Ingredient Notes

    Ingredients for the recipe.
    • Olive Oil. High-quality extra virgin olive oil is key for a recipe like this, similar to pesto like our Artichoke Pesto Pasta. The majority of the flavor is going to come from the olive oil. If the olive oil is generic or rancid, the whole dish will be too.
    • Onions. You can substitute shallots for onions for a more subtle flavor.
    • Bay Leaves. Bay leaves can be left out, or you can substitute basil.

    *Please see the recipe card below for more information on the ingredients.

    How to Make Marinated Eggplant and Onion

    Preparing eggplant and onion to be grilled.

    Step 1: Preheat the grill to high heat. Slice the eggplant into ½ inch slices.

    Step 2: Chop the onions and place them on a sheet of aluminum foil. Season with a tablespoon of olive oil.

    Step 3: Wrap the aluminum foil around the onions into a pouch.

    Step 4: Lay the eggplant out and season both sides with salt and pepper.

    Grilling eggplant on the grill.

    Step 5: Lower the heat on the grill to medium and place all the eggplant on the grill. Place the onions on the grill. Grill the eggplant on each side for about 4 minutes.

    Chopped grilled eggplant.

    Step 6: Remove the eggplant from the grill and let it cool for 10 minutes.

    Step 7: Chop the eggplant into half-inch pieces and place them in a large bowl.

    Grilled onions, eggplant, whole garlic, and seasoning combined in a bowl.

    Step 8: Add the grilled onions to the bowl.

    Step 9: Season the mixture with Italian seasoning, crushed red pepper, salt, pepper, bay leaves, and crushed garlic. Add in 1 cup of olive oil and juice from half a lemon and mix well.

    Eggplant and onions marinating in a mason jar.

    Step 10: Transfer the mixture to mason jars and marinate in the fridge overnight. Enjoy the following day on toast or with ricotta cheese.

    Marinated eggplant on toast with ricotta.

    This is a great topping to serve with crostini or sourdough toast. I like to serve Zucchini alla Scapece over toast like this too, and both of these recipes are great appetizers or side dishes to serve with dinner.

    Pro-Tips

    1. If you are pan-frying the eggplant instead of grilling, lay the eggplant out flat and season with salt. Let it sit for 20 minutes, then pat them dry with a paper towel.
    2. If you don't have mason jars, just tightly wrap the bowl with Saran Wrap.
    3. The eggplant should be grilled long enough to have grill marks.

    What to Serve Marinated Eggplant and Onion with

    • Sandwiches. Marinated eggplant and onion goes great on any Italian Chicken Cutlets sandwich or serve it with a Peppers and Eggs Sandwich for breakfast.
    • Pasta. This is a great addition to any pasta. Add it to pasta with Authentic Italian Sunday Sauce or a pasta with Pistachio Pesto.
    • Summer Dinners. It's a great addition to any summer dinners like Chicken Spiedini or Grilled Lemon Pepper Chicken Thighs!

    Recipe FAQs

    How long can Marinated Eggplant and Onion be stored?

    It can be stored in the fridge for up to 1 week. Throughout the week, the eggplant will get more and more creamy. I like to let it marinate at least overnight, although 8 hours does the trick.

    Why do you salt the eggplant before cooking it?

    Salting will help remove some moisture from the eggplant so that when it cooks, it's not mushy. When pan frying, this is important because the liquid is trapped but when grilling, you can skip this step.

    More Amazing Sides!

    • summer farro salad with Italian white beans
      Summer Farro Salad with Cannellini Beans
    • Italian pasta salad in large bowl garnished with basil.
      Italian Pasta Salad
    • lemon spinach orzo
      Lemon Spinach Orzo
    • steamed artichokes
      Easy Steamed Artichokes

    If you love this eggplant side, leave a rating below! It's so easy! You can also follow us on Instagram @vindelgiudice.

    📖 Recipe

    Marinated eggplant on toast with ricotta.

    Marinated Eggplant and Onion

    Vincent DelGiudice
    Marinated eggplant and onion is the perfect topping for toast, the best addition to a sandwich, and even amazing right off the spoon!
    5 from 1 vote
    Print Recipe Pin Recipe
    Prep Time 30 minutes mins
    Cook Time 30 minutes mins
    Total Time 1 hour hr
    Course Appetizer, Side Dish
    Cuisine Italian
    Servings 8 servings
    Calories 294 kcal

    Equipment

    • 1 saucepan or cast iron pan
    • 1 large mason jar or storage container

    Ingredients
      

    • 2 eggplant, slices into ½ inch thick circles
    • ½ large onion or 1 medium onion, chopped
    • 2 tablespoon olive oil for cooking
    • 1 cup extra virgin olive oil for marinating
    • 1 lemon
    • 1 teaspoon salt
    • 1 teaspoon black pepper
    • 2 bay leaves
    • 3 cloves garlic, crushed
    • 1 tablespoon Italian seasoning
    • 1 Tsp crushed red pepper

    Instructions
     

    • Preheat the grill to high. Place the chopped onions in a sheet of aluminum oil. Season with salt and pepper and drizzle with olive oil. Wrap the aluminum foil into a pouch. Then lay the eggplant out and season both sides with salt and pepper.
    • Lower the heat on the grill to medium and place all the eggplant on the grill. Place the onions on the grill. Grill the eggplant on each side for about 4 minutes.
    • Allow the eggplant and the onions to cool for 10 minutes. Chop the eggplant into half-inch pieces. Place onions and eggplant into a large bowl. Combine with EVOO, lemon juice, Italian seasoning, salt, pepper, crushed red pepper, and crushed garlic cloves. Transfer to mason jars and store in the refrigerator over night.
    • Enjoy on toast, sandwiches, or however you can imagine.

    Notes

    1. If you are pan-frying the eggplant instead of grilling, lay the eggplant out flat and season with salt. Let it sit for 20 minutes then pat them dry with a paper towel.
    2. If you don't have mason jars, just tightly wrap the bowl with saran wrap.
    3. The eggplant should be grilled long enough to have grill marks.

    Nutrition

    Calories: 294kcalCarbohydrates: 10gProtein: 2gFat: 29gSaturated Fat: 4gPolyunsaturated Fat: 3gMonounsaturated Fat: 21gSodium: 589mgPotassium: 309mgFiber: 4gSugar: 5gVitamin A: 116IUVitamin C: 11mgCalcium: 29mgIron: 1mg
    Tried this recipe?We'd love for you to Leave a Review!

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    Reader Interactions

    Comments

    1. Vinny

      June 21, 2024 at 12:10 am

      5 stars
      An easy marinated eggplant spread we make in the summer whenever we're grilling! I know you'll enjoy!

      Reply
    5 from 1 vote

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    Recipe Rating




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    Vinny in the Kitchen.

    Vinny DelGiudice, MS CCC-SLP

    My name is Vinny. I am an Italian-American home cook, a photographer, and previously, a speech pathologist specializing in swallowing and voice disorders. I share the recipes I grew up eating in my home and the recipes that I cook for my family. Always From Scratch is about cooking homemade meals and eating with family.

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