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 Leftover Beef Casserole?

You need 10 ingredients. The key ingredients include: 1 large onion, 3 stalks celery, 1 green pepper, 2 c. left-over roast beef, and more.

Is Leftover Beef Casserole suitable as soups & stews?

Yes, Leftover Beef Casserole falls under the Soups & Stews category and is a great choice for this type of meal.

How do I store leftover Leftover Beef Casserole?

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

Leftover Beef Casserole Recipe

Name: Leftover Beef Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 large onion; 3 stalks celery; 1 green pepper; 2 c. left-over roast beef; 1 c. mushroom soup; 1/2 c. water; 1/2 tsp. salt; dash of pepper; 2 Tbsp. oil; chow mein noodles

Try this homemade Leftover Beef Casserole recipe the whole family will love. Made with onion, stalks celery, green pepper and left-over roast beef. Easy…

This Leftover Beef Casserole relies on simple, everyday ingredients such as large onion, stalks celery, green pepper and left-over roast beef. It comes together quickly and makes 4 servings, at about 409 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.

Updated Jun 30, 2026

Serves 4 Soups & Stews

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

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

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

My Personal Notes

Saved locally in your browser — visible only to you.

Leftover Beef Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions