Mexican vermicelli soup

Ingredients
Rice vermicelli ½ cup
Butter 1 tbsp
Tomato puree 2 tbsp heaped
Cheddar cheese 1 tbsp
Onion finely chopped 2 tbsp
Stock 4 cups
Salt and pepper ½ tsp each
Method
Heat butter, fry onions add stock with tomato puree, vermicelli, salt and pepper, lastly add cheese and serve hot.