Lime Fish Tacos

Ingredients

• 1 lb red snapper or 1 lb orange roughy fillet
• 1 garlic clove, minced
• 2 tablespoons butter or 2 tablespoons margarine
• 7 teaspoons lime juice, divided
• 14 teaspoon white pepper
• 2 tablespoons reduced-fat sour cream
• 2 tablespoons fat-free mayonnaise
• 1 dash hot pepper sauce
• 7 flour tortillas, warmed (8-inch)
• 1 cup lettuce, shredded
• 1 cup tomatoes, chopped