Preheat oven to 350 degrees.
Place a skillet over medium heat, add the oil if using.
Add the chorizo and cook, stir frequently to cook evenly and avoid it from sticking to the bottom. It'll take about 6-7 minutes to cook.
Once cooked, remove the excess fat from the skillet or place the cooked chorizo over a paper towel to absorb the fat.
Place the chorizo in an oven proof dish, setting aside 2 tablespoons to garnish when ready to serve.
Place the grated cheese over the chorizo and bake for about 10-12 minutes or until the cheese is melted and bubbling.
Remove from oven and place over a heat proof surface.
Serve warm with salsa and plenty of flour tortillas or tortilla chips.
