"Here’s a rich and comforting dish that’s terrific right away or made ahead and baked the next day. Pesto makes a surprising filling for these stuffed shells with meat sauce. —Blair Lonergan, Rochelle, Virginia..."
INGREDIENTS
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20 uncooked jumbo pasta shells
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1 pound ground beef
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1 large onion, chopped
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1 carton (15 ounces) ricotta cheese
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2 cups shredded Italian cheese blend, divided
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1/2 cup grated Parmesan cheese
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1/4 cup prepared pesto
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1 large egg
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1 jar (26 ounces) spaghetti sauce, divided