"This casserole recipe has all the goodness of a tuna melt but in casserole form...."
INGREDIENTS
•
1 16-ounce package rigatoni
•
4 tablespoons butter, divided
•
1 tablespoon olive oil
•
1 onion, sliced
•
2 tablespoons flour
•
2 cups milk
•
1 cup Swiss cheese, shredded
•
2 5-ounce cans of tuna, drained
•
1/2 cup Parmesan cheese, grated
•
1 teaspoon salt
•
1/2 teaspoon ground black pepper
•
3 tablespoons fresh chives, chopped