How to Make My Grandmother's Baked Tuna Noodle Casserole with Crunchy Topping

Instructions:

1. Preheat your oven to 350°F (175°C).
2. Bring a large pot of salted water to boil. Add elbow macaroni and cook until al dente (check package instructions).
3. In a mixing bowl, combine milk, cream of mushroom soup, garlic powder, Dijon mustard, salt, and pepper. Whisk until smooth.
4. In the pot with drained pasta, add tuna, peas, and shredded cheddar cheese. Pour the sauce over the mixture and stir until well combined.
5. Pour the mixture into a greased 2-quart baking dish.
6. In a separate bowl, mix breadcrumbs, grated Parmesan cheese, melted butter, and parsley. Sprinkle the mixture evenly over the casserole.
7. Place the baking dish in the preheated oven and bake for 25-30 minutes, or until bubbling and the top is golden brown.
8. Allow to cool for 5-10 minutes before serving.