I have a really yummy Tuna & Noodle Casserole recipe

Ingredients:
125g flat noodles (I just use the long life noodles)
1 tablespoon olive or vegetable oil
1 medium onion, chopped
1 medium green capsicum, chopped
1 stick celery, sliced
1/3 cup plain flour
Pinch of black pepper
3 1/2 cups milk
1/2 greated Swiss cheese (I just use Tasty)
2 x 185g tins tuna (or one big one LOL), drained and flaked
1/3 cup grated Parmesan cheese

Method:
Preheat oven to 180 degrees.
Cook noodles according to the directions on the package. Drain, rinse an drain again; return to the saucepan and cover.
Meanwhile, heat the oil over medium heat in a large saucepan.
Add the onion, green capsicum and celery and cook for 5 minutes, or until the vegetables are tender.
Stir in the flour and black pepper.
Add the milk and cook, stirring constantly, for 10 minutes, or until the mixture is thickened and bubbly.
Add the Swiss cheese, stirring until melted.
Stir in the cooked noodles and then carefully stir in the tuna.
Spoon the tuna and noodle mixture into a lightly greased 20 x 20 x 5cm baking dish.
Top with grated Paramasen cheese and bake for 25 minutes, or until heated through.