Preheat oven broiler.
In a small bowl, combine chili powder, cumin, 2 cloves of garlic, salt, and pepper; blend well then rub the mixture into both sides of tenderloin cutlets. Place pork on a lightly oiled broiler pan; broil for 4 minutes per side or until browned.
Meanwhile, combine next 6 ingredients (lime juice through jalapeno) and remaining garlic in a small saucepan over medium-high heat; cook, stirring constantly, just until mixture comes to a boil.
Serve each pork cutlet topped with a tablespoon or two of the hot salsa; sprinkle with chopped cilantro and diced avocado.