# Tuna Tetrazzini

> A delicious casserole that can be prepared ahead and refrigerated until ready to bake and serve.

**Prep time:** N/A
**Cook time:** 50 minutes
**Total time:** 50 minutes
**Servings:** 6

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## Ingredients

- 8 ounces thin spaghetti, cooked al dente and drained
- 6 tablespoons butter, divided
- 16 ounces thinly sliced mushrooms
- 4 green onions, thinly sliced
- 4 tablespoons all-purpose flour
- 2 cups milk
- 1/2 teaspoon salt, or to taste
- 1/8 teaspoon freshly ground black pepper
- 2 cans (4 to 6 ounces each) tuna, drained and flaked
- 1 cup frozen green peas, cooked and drained
- 1 cup shredded natural Parmesan cheese, or about 1/2 cup finely grated Parmesan cheese
- 1 cup soft fresh bread crumbs

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## Shopping List

### 🍝 Pasta & Grains
- [ ] 8 ounces thin spaghetti

### 🥩 Meat & Seafood
- [ ] 2 cans (4-6 oz each) tuna

### 🥬 Produce
- [ ] 16 ounces mushrooms
- [ ] 4 green onions

### 🥛 Dairy
- [ ] 6 tablespoons butter
- [ ] 2 cups milk
- [ ] 1 cup shredded Parmesan cheese

### 🥫 Pantry
- [ ] All-purpose flour (need 4 tbsp)
- [ ] Salt (need 1/2 tsp)
- [ ] Black pepper (need 1/8 tsp)
- [ ] 1 cup frozen green peas
- [ ] Soft fresh bread crumbs (need 1 cup)

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## Instructions

1. **Preheat oven.** Heat oven to 350°F. Grease a 2 1/2- to 3-quart baking dish.

2. **Cook mushrooms and onions.** In a large saucepan over medium-low heat, melt 4 tablespoons of the butter. Add the mushrooms and saute, stirring, until mushrooms are browned and tender. Add the green onions and continue cooking for 1 minute or until well blended. Stir in the milk. Continue cooking, stirring constantly, until thickened. Add salt, to taste, and pepper. Stir in the flaked tuna and peas. Stir in the spaghetti until well blended. Turn the mixture into the prepared casserole. Sprinkle Parmesan over the casserole.

3. **Prepare topping.** Melt the remaining 2 tablespoons of butter and toss with the bread crumbs. Sprinkle the buttered crumbs over the Parmesan layer. Bake for 25 to 30 minutes, until lightly browned and bubbly.

4. **Serve.** Serves 6.

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## Notes

This casserole can be assembled ahead of time and refrigerated until ready to bake.