Creamy Seaside Casserole

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

Creamy Seaside Casserole combines cheesy, savory flavors with tuna, peas, and vegetables, making it a hearty, comforting dish perfect for family dinners or casual gatherings.

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Ingredients

  • 1 pkg. Velveeta shells and cheese
  • 1/4 cup chopped onion
  • 1/4 cup green pepper
  • 2 tbsp margarine
  • 10 oz green peas, thawed and drained
  • 6.5 oz tuna, drained and flaked
  • 1/2 cup mayonnaise

Instructions

  1. Prepare shells and cheese as directed on the package.
  2. Sauté onions and green pepper in margarine.
  3. Add the sautéed vegetables to the prepared shells and cheese along with the green peas, flaked tuna, and mayonnaise.
  4. Mix everything well until combined.
  5. Spoon the mixture into a 1 1/2-quart casserole dish and cover.
  6. Bake at 350°F for 30 minutes or until thoroughly heated.

Tips & Substitutions

For a creamier texture, consider adding a splash of milk or cream to the casserole mixture before baking. You can also substitute the tuna with canned salmon or shredded chicken for a different flavor profile. Fresh herbs like dill or parsley can add a nice touch. If you prefer more veggies, add in some chopped mushrooms or spinach to boost nutrition.

Serving Suggestions

This Creamy Seaside Casserole pairs beautifully with a crisp green salad or Sea Slaw for a refreshing contrast. You could also serve it alongside garlic bread or steamed vegetables for a complete meal. For added flavor, consider topping with grated cheese during the last few minutes of baking to create a bubbly, golden crust.

Storage & Reheating

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

Nutrition & Diet Analysis (per serving)

Each serving of Creamy Seaside Casserole contains roughly 921 calories, with 11g protein, 8g carbohydrates, and 96g fat. It is an excellent source of vitamin C (28% of the Daily Value) and protein (22% of the Daily Value). Note that it is relatively high in sodium, at 867mg per serving (38% of the Daily Value).

921 kcal 46% DV
Protein Fat Carbs

Macronutrients

Protein 11g 22% DV
Total Fat 95.8g 100% DV
Carbs 8g 3% DV
Fiber 1.2g 4% DV
Sugar 1.9g 4% DV

Electrolytes

Sodium 867.5mg 38% DV
Potassium 192.6mg 4% DV
Cholesterol 18mg 6% DV

Vitamins & Minerals

Vitamin A 15.9mcg 2% DV
Vitamin C 25.1mg 28% DV
Vitamin D 0.6mcg 3% DV
Calcium 23mg 2% DV
Iron 1.4mg 8% DV
Diet fit Keto-friendly
Contains Milk Egg 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 make this casserole ahead of time?

Yes, you can assemble the casserole a day in advance. Just cover it tightly and refrigerate until you're ready to bake. When you're ready to serve, you may need to add a few extra minutes to the baking time since it will be cold from the fridge.

What can I substitute for Velveeta shells and cheese?

If you prefer a homemade option, you can use cooked pasta with a cheese sauce made from cheddar cheese, milk, and butter. This will give you a similar creamy texture that works well in the casserole.

Is it possible to make this dish gluten-free?

Absolutely! You can use gluten-free pasta in place of the regular shells. Make sure to check that all other ingredients, like mayonnaise and canned goods, are also gluten-free to ensure the dish meets your dietary needs.

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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