You can simply toast the bread. A more delicious option is to add 1 tablespoon of butter to a pan on medium heat and toast each side of the bread in the butter until golden brown. When you flip the toast, add the other tablespoon of butter.
Scrape the bread with an extra clove of garlic. Allow the bread to cool slightly, then add the ricotta cheese with a pinch of salt and pepper. Top it with your bruschetta and serve!
Notes
Let the toast slightly cool before putting the ricotta on so it doesn't immediately melt off.
Draining the liquid from the tomatoes will make for a less mushy bruschetta.
Chop the onion thin but don't mince it. You want clear cuts but not chopping into complete mush.