Place tomatillos and garlic in a large pot.
Add water to cover.
Bring to boil over high heat.
Reduce heat to medium.
Let boil for 5 minutes.
Take pot off heat and strain.
Let cool completely.
Core tomatillos.
Place tomatillos, garlic, onion, peppers, cilantro, lime juice, salt, cumin, and cayenne into blender.
Blend until desired consistency.
