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 Weight Watcher Tuna Noodle Casserole?

You need 11 ingredients. The key ingredients include: 12 ounces uncooked egg noodles, 12 ounces tuna in water, drained, 1 (12 ounce) can sliced mushrooms, 1 cup frozen peas, thawed, and more.

Is Weight Watcher Tuna Noodle Casserole suitable as seafood?

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

How do I store leftover Weight Watcher Tuna Noodle Casserole?

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

Weight Watcher Tuna Noodle Casserole Recipe

Name: Weight Watcher Tuna Noodle Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 12 ounces uncooked egg noodles; 12 ounces tuna in water, drained; 1 (12 ounce) can sliced mushrooms; 1 cup frozen peas, thawed; 16 ounces nonfat sour cream; 1/2 cup fat-free mayonnaise; 2 teaspoons Dijon mustard; 1 teaspoon dried thyme (be careful with this); 1/2 teaspoon salt; 1/4 teaspoon black pepper; 1/2 cup shredded reduced-fat cheese, any kind

Try this homemade Weight Watcher Tuna Noodle Casserole recipe the whole family will love. Made with egg noodles, water, mushrooms and frozen peas. Easy …

This Weight Watcher Tuna Noodle Casserole relies on simple, everyday ingredients such as uncooked egg noodles, tuna in water, drained, frozen peas, thawed and nonfat sour cream. It comes together quickly and makes 4 servings, at about 951 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.

Weight Watcher Tuna Noodle Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions