INGREDIENTS
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1 small zucchini, sliced thin
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1/2 medium onion, chopped fine
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1 rib celery, chopped fine
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1 small carrot, sliced thin
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1/2 c shredded cheese, mozzarella or cheddar
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1 1/2 c spaghetti sauce
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1 c browned ground beef or sausage (optional