Prep Time: 15 minutes
Cook Time: 10 minutes
Combine ground beef, salsa, tortilla chips, chili powder and salt in medium bowl; mix lightly but thoroughly. Shape into 8 patties.
Place hamburger bun tops, cut-side up, in pan large enough to hold one layer. Divide cheese evenly over buns; cover with foil. Place on edge of preheated charcoal grill 5 minutes or until cheese is melted.
Grill patties on preheated medium-hot grill; grill 5 minutes each side or until no longer pink in center. Serve on hamburger bun bottoms; top with tomatoes, lettuce and, if desired, peppers. Cover with bun tops, cheese-side down.