1. In a 10- to 12-inch frying pan over medium heat, crumble chorizo; stir with onion, garlic, and cumin until browned, about 8 minutes. Discard fat.
2. In a food processor, whirl sausage mixture, tomatillos, cheese, and lime juice until smooth. Or mince meat mixture and tomatillos, put in a bowl, and stir in cheese and lime juice.