Macaroni cheese with chorizo

The macaroni and cheese recipe with sausage recipe is softer and delicate than one might imagine. This is due to the careful selection of cheese is essential to soften the intense flavor of chorizo.
This is a typical recipe that my grandmother cooked us Saturday when we went to town to see her. What child could resist this delicious recipe?
I invite you to change the style of cheese according to the occasion and gave anointing style flavor that you please get.

ingredients:
     500 grams of macaroni
     150g fresh chorizo
     125 g of crushed tomatoes
     1 large onion
     cheese gratin
     Salt, oregano aceitey

Preparation:
Boil a pot of water, salt and a little oil. Bring to the boil the pasta is incorporated until cooked.
Chop the onion into strips. In a skillet with a little deaceitese refríe onion until golden, add the tomato paste, salt and a little oregano. Simmer for 5 minutes.
When the pasta is cooked, drain and add it to the pan with the sauce. Wrap the pasta with the sauce and place in a baking dish. Cut the sausage into slices and put them on the source with the macaroni, sprinkle with cheese to taste and place in a preheated oven at 180 degrees for 5 minutes.