Ingredients

• 1 clove garlic, crushed
• 2 tablespoons olive oil
• 2 tablespoons plain yogurt
• ¼ cup sour cream, or to taste
• ½ cup thinly sliced sweet onion
• 2 cups thinly sliced tomatoes
• salt and freshly ground black pepper to taste
• 1 pinch cayenne pepper, or to taste
• 8 thick slices french bread
• 1 tablespoon sliced fresh chives