Cheesy Deluxe Tuna Casserole Recipe

Name: Cheesy Deluxe Tuna Casserole Recipe
Ingredients: 12 ounces fusilli pasta; 1 tablespoon olive oil; 1 small white onion, diced; 3 tablespoons butter; 3 tablespoons all-purpose flour; 2 cups whole milk; 1 ½ cups chicken broth; 2 teaspoons Dijon mustard; ½ teaspoon smoked paprika; ¼ teaspoon ground nutmeg; 1 cup shredded cheddar cheese; 1 cup shredded Gruyère cheese; Salt and pepper, to taste; 11.5 ounces canned tuna, drained; ¾ cup frozen peas; ¾ cup tinned corn, drained; ½ cup grated Parmesan; ¾ cup fresh breadcrumbs