In medium bowl combine tuna, milk powder, cracker crumbs, onion, chili peppers, and egg; mix well and form into 8 equal burgers. In 12 in. Skillet heat oil over medium heat; add tuna burgers and cook, turning once, until lightly bowned, 2-4 minutes on each side. In measuring cup or small bowlcombine tomatoes and chili powder and pour over burgers. Cover pan, reduce heat to low, and let simmer until sauce is thoroughly heated, about 5 minutes. Transfer burgers and sauce to flameproof platter and sprinkle with cheese. Broil or until cheese is melted and lightly browned, 1-2 minutes. 1 serving91 calories.