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 Regal Tuna Casserole?

You need 13 ingredients. The key ingredients include: 2- 6 1/2 oz. cans of tuna, 2 Tbsp. margarine or cooking oil, 1 can condensed cream of celery soup, 1/4 c. catsup, and more.

Is Regal Tuna Casserole suitable as seafood?

Yes, Regal Tuna Casserole falls under the Seafood category and is a great choice for this type of meal.

How do I store leftover Regal Tuna Casserole?

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

Regal Tuna Casserole Recipe

Name: Regal Tuna Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2- 6 1/2 oz. cans of tuna; 2 Tbsp. margarine or cooking oil; 1 can condensed cream of celery soup; 1/4 c. catsup; 1/4 tsp. salt; 2 Tbsp. chopped pimento; 1/2 c. chopped onion; 1 pkg. frozen peas, thawed; 1- 4 oz. can sliced mushrooms; 1/2 tsp. dry mustard; 1 c. shredded cheddar cheese; 1/2 lemon thinly sliced and quartered; 1 c. prepared biscuit mix

Try this homemade Regal Tuna Casserole recipe the whole family will love. Made with tuna, margarine, condensed cream and catsup. Easy step-by-step instr…

This Regal Tuna Casserole relies on simple, everyday ingredients such as cans of tuna, margarine or cooking oil, catsup and salt. It comes together quickly and makes 4 servings, at about 444 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 Seafood

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

Saved locally in your browser — visible only to you.

Regal Tuna Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions