Heat broiler to high and arrange an oven rack in the middle.
Combine the 2 cups chopped tomatoes, the 1 clove of minced garlic, the 1/3 cup quartered olives, the 1/3 cup thinly sliced basil and the 3 tablespoons of olive oil in a medium bowl. Season with salt and pepper and set aside.
Place bread slices on a baking sheet and brush both sides with the remaining 3 tablespoons of olive oil. Place on the middle oven rack and broil until golden and crisp, flipping halfway through. Check frequently to prevent from burning. Mine usually take anywhere from 2-4 minutes total.
Remove bread from oven and let cool slightly. Rub remaining whole clove of garlic all over one side of the bread slices. Sprinkle slices with salt.
Divide tomato mixture evenly between the slices and serve immediately. Don't let the bruschetta sit too long or the bread will get soggy.