INGREDIENTS
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Salt and ground black pepper
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Two 16-ounce boxes lasagna noodles
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4 tablespoons olive oil, plus additional for tossing with noodles
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2 pounds spicy Italian sausage, casings removed
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4 pounds ground beef
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1/2 medium yellow onion, diced
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3 cloves garlic, chopped
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Three 24-ounce jars good-quality store-bought tomato sauce
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1teaspoon onion powder
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1 teaspoon garlic powder
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1 teaspoon seasoned salt, such as Lawry's
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15 ounces ricotta cheese
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4 cups shredded mozzarella
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plus one 1-pound block mozzarella, sliced thinly