3 1/4 cups fusilli pasta
2 tablespoons butter
2 tablespoons all-purpose flour
2 cups milk
1 1/2 cups shredded Cheddar cheese, divided
3 teaspoons lemon juice
1/2 teaspoon mustard powder
salt and ground black pepper to taste
15 ounces tuna packed in water, drained and flaked
1/4 cup dry bread crumbs
Preheat the oven to 350 degrees F (175 degrees C).
Bring a large pot of lightly salted water to a boil. Cook fusilli in the boiling water, stirring occasionally, until tender yet firm to the bite, about 12 minutes.
Meanwhile, melt butter in a saucepan over medium heat. Whisk in flour, stirring constantly for about 1 minute. Remove from heat and gradually pour in milk, whisking constantly the entire time to avoid lumps from forming. Return to heat and cook, stirring constantly, until slightly thickened, about 2 minutes. Stir in 1/2 of the Cheddar cheese. Add lemon juice, mustard powder, salt, and pepper and mix well.
Drain fusilli and fold into the sauce. Mix in tuna. Pour mixture into an 8-inch casserole dish and sprinkle with breadcrumbs. Top with remaining Cheddar cheese.
Bake in the preheated oven until cheese is melted and golden, about 30 minutes.
Source : allrecipes.com