Combine tomatoes, bell pepper, onion, balsamic vinegar, 1/4 cup olive oil, basil, and garlic in a medium bowl; let tomato mixture rest for 15 to 30 minutes.
2
Set an oven rack about 6 inches from the heat source and preheat the oven's broiler.
3
Arrange French bread slices on a large baking sheet; drizzle with 1/4 cup olive oil.