Slice green peppers in half vertically; remove core and seeds. Place peppers, hollow side ups up, in a glass casserole dish; cover with plastic wrap. Microwave on HIGH for 6-8 minutes or until very tender; drain liquid and set aside. In a large skillet combine ground beef, onion and garlic; cook over medium-high heat until beef is cooked and onions become tender; drain. Add salsa, breadcrumbs and 1 cup cheese to ground beef mixture; stir to mix. Mound beef mixture in pepper halves. Sprinkle with remaining cheddar cheese. Bake in 350F oven for 20-30 minutes or until hot and cheese melts. Yield: 4-6 servings.