Source : Directions 1 Preheat Oven To 375f 2 In A Medium Pot Heat Oil Over Medium-high Add Onion And Cook Until Softened About 6 Minutes 3 Add Flour And Co...
PreTime
more Minutes
CookTime
a few Minutes
Yield
Some Servings
Sent by Performance Triad
at : March 4, 2026
Step:
Directions: 1. Preheat oven to 375F.
2. In a medium pot, heat oil over medium-high. Add onion and cook until softened, about 6 minutes.
3. Add flour and cook, stirring constantly, 1 minute. Gradually add milk, whisking constantly, and cook until slightly thickened and bubbling, about 3 minutes.
4. Season with salt and pepper and let sauce cool slightly.
5. In a food processor, combine bun, Parmesan, Italian seasoning and red-pepper flakes. Process until fine crumbs form.
6. Transfer half the mixture to a large bowl and combine with spinach, tuna and half the sauce; season with salt and pepper.
7. Fill each shell with 2 heaping Tbsp. spinach mixture and place in a 9x13 inch baking dish.
8. Top with remaining sauce and breadcrumb mixture.
9. Bake until sauce is bubbling and breadcrumbs are golden, about 20 minutes
Ingredients
Ingredients:
3 Tbsp. extra-virgin olive oil
1 small yellow onion, diced small
1/4 cup all-purpose flour (spooned and leveled)
4 cups whole milk
Coarse salt and ground pepper
1 hamburger bun, torn into large pieces
1/4 cup grated Parmesan
1/2 tsp. Italian seasoning
1/2 tsp. red-pepper flakes
1 package (10 oz.) frozen chopped spinach,
thawed and excess liquid squeezed out
2 cans (6 oz.) each) light tuna in water, drained and flaked
6 oz. jumbo pasta shells (about 20), cooked according to package instructions