Ingredients

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Instructions

1. Preheat grill or grill pan to medium-high heat. Season patties lightly with salt and pepper. Drizzle with vinegar.
2. Grill patties, covered, 5 minutes per side or until no longer pink. Top with cheese, and grill 1 minute longer or just until cheese is melted.
3. Stir together mayonnaise and pesto. Spread mixture on buns. Serve burgers on buns with tomato and lettuce.