7-Minute Tuna Casserole

Prep: 10 min Cook: 30 min Serves: 4 Cuisine: American

A quick and hearty tuna casserole featuring crispy onion rings, tender mushrooms, and a creamy celery sauce, perfect for a comforting weeknight dinner.

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Ingredients

  • 6 1/2 oz. can tuna, drained
  • 3 oz. can French fried onion rings
  • 1 cup celery, chopped
  • 1/4 teaspoon onion powder
  • 4 oz. can mushrooms, drained
  • 1 can cream of celery soup

Instructions

  1. Combine half of the onion rings with drained tuna, chopped celery, drained mushrooms, onion powder, and cream of celery soup in a greased casserole dish.
  2. Bake at 350°F (175°C) for 25 minutes.
  3. Sprinkle the remaining onion rings on top of the casserole.
  4. Bake an additional 5 minutes until onion rings are crispy and golden.

Tips & Substitutions

For a creamier texture, consider adding a dollop of sour cream or Greek yogurt to the mixture. If you don't have celery soup, cream of mushroom or chicken soup can be a good substitute. To add extra flavor, include a teaspoon of Worcestershire sauce or a sprinkle of paprika. Feel free to incorporate other vegetables like peas or corn for variety.

Serving Suggestions

This casserole pairs beautifully with a simple side salad or some steamed vegetables for a complete meal. Consider serving it alongside a light dish like Tossed Tuna Salad for a refreshing contrast. For an added crunch, serve with crusty bread or garlic toast, which complements the creamy casserole perfectly.

Storage & Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place the casserole in a preheated oven at 350°F (175°C) for about 15-20 minutes, or until heated through. You can also microwave individual portions, but be sure to cover them to retain moisture.

Nutrition & Diet Analysis (per serving)

Each serving of 7-Minute Tuna Casserole contains roughly 355 calories, with 15g protein, 45g carbohydrates, and 14g fat. It is an excellent source of protein (30% of the Daily Value) and dietary fiber (20% of the Daily Value), and a good source of iron and calcium. Note that it is relatively high in sodium, at 960mg per serving (42% of the Daily Value).

355 kcal 18% DV
Protein Fat Carbs

Macronutrients

Protein 15.2g 30% DV
Total Fat 13.8g 18% DV
Carbs 45.3g 16% DV
Fiber 5.6g 20% DV
Sugar 6.5g 13% DV

Electrolytes

Sodium 960mg 42% DV
Potassium 545.2mg 12% DV
Cholesterol 27.6mg 9% DV

Vitamins & Minerals

Vitamin A 37.2mcg 4% DV
Vitamin C 7.9mg 9% DV
Vitamin D 0.6mcg 3% DV
Calcium 152mg 12% DV
Iron 3mg 16% DV
Diet fit High-fiber Under 400 cal
Contains Milk Fish

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I use fresh vegetables instead of canned?

Absolutely! Fresh vegetables like chopped bell peppers, carrots, or green beans can enhance the flavor and texture of your casserole. Just make sure to sauté them slightly before adding to the mix to ensure they cook through during baking.

Is there a way to make this dish gluten-free?

Yes, to make this casserole gluten-free, ensure the cream of celery soup is gluten-free or make your own. Substitute the French fried onion rings with gluten-free alternatives or simply omit them for a delicious, crunchy topping.

Can I prepare this casserole ahead of time?

Yes, you can prepare the casserole up to the baking stage and store it in the refrigerator for up to 24 hours before baking. Just cover it well to prevent it from drying out. When ready to bake, add a few extra minutes to the cooking time if baking straight from the fridge.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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