Dinner: Nacho Burgers

Ingredients

3 tablespoons red wine vinegar
1 tablespoon vegetable oil
1 chipotle chile in adobo, seeded and minced
3 plum tomatoes, finely diced
2 tablespoons red onion, finely diced
3 tablespoons chopped cilantro
Salt

Instructions

Make the salsa In a bowl, combine all of the ingredients and season with salt.
Make the cheese sauce In a saucepan, melt the butter. Stir in the flour and cook over moderate heat for 30 seconds. Whisk in the milk and cook, whisking, until thickened, 5 minutes. Stir in the Jack cheese until melted, then stir in the pecorino; season with salt and pepper. Let cool until spreadable.
Make the burgers Light a grill. Form the beef into 4 patties and brush with oil; season with salt and pepper. Grill over moderately high heat until browned outside and medium within, 4 minutes per side. Place the burgers on the buns, top with the cheese sauce, salsa, jalapeños and chips, and serve.

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