Ingredients
Method
- Preheat oven to 375°F. Melt 3 tbsp butter in a skillet over medium heat, then cook onion and mushrooms for 5 minutes. Add garlic and cook 30 seconds.
- Sprinkle flour over the vegetables and stir for 1 minute. Slowly whisk in milk and simmer until thickened, 3 to 4 minutes. Remove from heat and stir in cheese and salt.
- Cook egg noodles until just al dente; drain. Fold noodles, tuna, and peas into the sauce.
- Spread mixture into a 9x13-inch dish. Toss panko with 2 tbsp melted butter and scatter on top.
- Bake 20 to 25 minutes until bubbly and golden. Rest 5 minutes before serving.
Notes
For a crispier top, broil the casserole for a minute at the end, watching closely so the breadcrumbs don’t burn. The casserole can be assembled without the topping and refrigerated overnight; add the buttered panko right before baking and add 5 to 10 minutes to the bake time.
