1/4 cup bread crumbs
1/4 cup finely chopped onion
1 pound lean ground beef
1 large Land O Lakes® Egg, slightly beaten
1 (1.25-ounce) package taco seasoning mix
8 (3/4-ounce) slices Land O Lakes® Deli American
4 white or wheat hamburger buns
Pico de gallo
Sliced pitted ripe black olives
Heat gas grill on medium or charcoal grill until coals are ash white.
Combine all burger ingredients except cheese in bowl; mix well. Shape into 4 patties.
Place burgers onto grill. Grill, turning once, 10-14 minutes or until internal temperature reaches at least 160°F and meat is no longer pink in center. Top each burger with 2 slices cheese; continue grilling until cheese is melted.
Spread sour cream onto bottom half of buns. Layer bottom half of buns with lettuce, burgers, avocado slices, pico de gallo, and black olives. Place top half of buns onto burgers.