In a medium bowl combine ground beef, taco seasoning, Doritos, salsa, salt and pepper. Mix until well combined. Divide the mixture into 4 quarters, and form into patties that are about 1 inch thick. Lightly grease the grill grates of an outdoor grill. Heat the grill to medium-high heat.
Place patties onto the grill and cook, turning once, for about 10-15 minutes or until fully cooked (the internal temperature has reached 160 degrees). During the last few minutes of cooking top each patty with 2 slices of Colby-jack cheese.
Meanwhile, split the buns and toast them on the grill until lightly browned. Remove from the grill. Place the cooked burgers on the buns and top with desired condiments.
(Makes 4 Servings)