PREP. Clean tomatillos by removing the outer casing of papery leaves and rinse.
BOIL. Fill a medium saucepan with water and bring to a boil. Add tomatillos and jalapeños and boil covered for 15 minutes.
DRAIN. Drain water from pot and let tomatillos and jalapeños cool.
BLEND. In a high speed blender, combine tomatillos, jalapeños, garlic, cilantro, lime or lemon juice, water and salt to taste. Blend well, about 2 minutes. Add more water if needed.
TASTE. Add more salt, if needed.
SERVE.
Notes
STORE. In an airtight container in the refrigerator for up to 5 days.
HEAT. I usually prefer to use one jalapeño pepper, because I prefer things to be on the mild to medium side. Jalapeños can vary in heat, sometimes being very mild and sometimes fire hot. I would boil two and start by blending one and taste, add second one if you want more heat. I have also used sereno peppers, but keep in mind these can be very hot.