Toast the bread slices -- either in a toaster, or by baking them in the oven at 400°F -- until crispy and golden. (Toasting/baking time will totally depend on the type and thickness of your bread.)
Take a clove of garlic and rub it cut-side-down all over the top of a slice of bread.
Take a tomato half and rub it cut-side-down all over the top of the bread.
Drizzle the bread evenly with a hint of olive oil. Sprinkle with a pinch of salt.
Repeat with the remaining slices of bread. Then serve immediately while they're nice and warm!