"Open sausage casings using kitchen shears; then just squeeze the sausage into the pan for browning...."
INGREDIENTS
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8 ounces uncooked spaghetti
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1 pound Italian sausage (about 4 links)
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1 (8-oz.) container refrigerated prechopped onion-and-bell pepper mix
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2 teaspoons jarred minced garlic
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1 tablespoon vegetable oil
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1 (24-oz.) jar fire-roasted tomato and garlic pasta sauce
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1 (16-oz.) package shredded sharp Cheddar cheese
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1 (8-oz.) package shredded mozzarella cheese, divided
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4 ounces fontina cheese, shredded
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1/2 cup (2 oz.) shredded Parmesan cheese