PREHEAT grill to medium-high heat. Make drainage holes in a sheet of ALCAN® Ultimate Grilling Foil with a grilling fork; set aside.
COMBINE ground beef, 1 cup salsa, ½ cup tortilla chips, ½ cup green onions, garlic salt and chili powder in large bowl until well blended. Shape beef mixture into 8 burgers, 4 inches in diameter and ½ inch thick.
PLACE sheet of ALCAN® Ultimate Grilling Foil on grill grate with the non-stick (dull) side facing up. Immediately place burgers on foil.
GRILL burgers uncovered, 5 minutes each side or until no longer pink in centre. Grill or lightly toast hamburger buns. Top burgers with 1 slice cheese before removing from grill; let melt. Place burgers on buns. Top with remaining salsa, tortilla chips and green onions.