- Combine tomatoes, onion, cucumber, basil, vinegar, and 1 tablespoon oil in a glass bowl.
- Allow to sit 15 to 30 minutes for flavors to blend.
- Toast bread until lightly browned.
- Rub 1 side of each bread slice with garlic.
- Brush same side with remaining oil.
- Spoon tomato mixture over oiled side of bread and serve.