Haven't you ever had baked macaroni and cheese? If not then you are missing a treat. Here's a basic recipe, you could always alter it and add vegetables, ham etc.
I love adding finely chopped bell peppers.
Baked Macaroni With Cheese
1 cup macaroni
1 tablespoon butter
1 tablespoon flour
1 cup milk
1/2 cup grated cheese
1 teaspoon salt
1/4 teaspoon pepper
1/4 teaspoon paprika
Boil macaroni in salted water until tender. Drain and rinse briefly in cold water.
Melt butter in saucepan; add flour; mix well and add cold milk slowly, stirring until smooth. Add cheese, stirring until cheese melts. Add salt, pepper and paprika.
Combine cheese sauce with cooked macaroni. Bake in a 190°C oven until golden.