Finely dice the tomatoes, removing seeds. Finely dice onion and 3 of the garlic cloves, keeping one aside. Toss all together.
Slice basic leaves into strips (chiffonade).
Add basil to tomato mixture. Drizzle with olive oil. Season with salt & pepper, to taste.
Sice baguette on the diagonal. Toast slices briefly, in the broiler, no more than a minute or two. Rub toast slices with 1 clove of garlic.
Top toast slices with tomato mixture. Serve and enjoy!