How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Seashell-Provolone Casserole?

You need 11 ingredients. The key ingredients include: 3 medium onions, firmly chopped, 1/4 c. margarine, melted, 1 1/2 to 2 lb. ground beef, 1 (15 1/2 oz.) jar plain spaghetti sauce, and more.

Is Seashell-Provolone Casserole suitable as pasta & noodles?

Yes, Seashell-Provolone Casserole falls under the Pasta & Noodles category and is a great choice for this type of meal.

How do I store leftover Seashell-Provolone Casserole?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Seashell-Provolone Casserole Recipe

Name: Seashell-Provolone Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 medium onions, firmly chopped; 1/4 c. margarine, melted; 1 1/2 to 2 lb. ground beef; 1 (15 1/2 oz.) jar plain spaghetti sauce; 1 (16 oz.) can stewed tomatoes; 1 (4 oz.) can mushroom stems and pieces, drained; 1 tsp. garlic salt; 1 (8 oz.) pkg. seashell macaroni; 1 (8 oz.) pkg. Provolone cheese, sliced; 3 c. commercial sour cream; 1 c. (4 oz.) Mozzarella cheese, shredded

Try this homemade Seashell-Provolone Casserole recipe the whole family will love. Made with onions, margarine, ground beef and spaghetti sauce. Easy ste…

This Seashell-Provolone Casserole relies on simple, everyday ingredients such as margarine, melted, to 2 lb. ground beef, (16 oz.) can stewed tomatoes and garlic salt. It comes together quickly and makes 4 servings, at about 747 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Pasta & Noodles

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Seashell-Provolone Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions