Cut the bread into 1/2 inch slices on a cutting board. Arrange on the baking sheet. Bake in the oven at 350F for 5-10 minutes, just until they become golden. Remove from the oven and let the bread cool on a platter.Chop tomatoes and onions into small pieces. Finely chop garlic and parsley. Combine tomatoes, onions, garlic, parsley, olive oil, salt and freshly ground black pepper in a salad bowl and mix gently.Let the salad stand for 10 minutes for the flavors to mix.Make the bruschetta. Arrange slices of bread on a serving platter. Spoon the tomato mixture over the bread slices and you are ready to serve your delicious bruschetta!