Add the olive oil to skillet and heat until oil thins. Using tongs, place the tomatillos stem side down and "blister" on high heat for about 2-3 minutes. Once they brown and the skin starts to blister, flip over using the tongs and blister the other side. Once both sides are blistered, remove from heat.
To the blender, add the blistered tomatillos, chopped onions, sliced jalapenos, garlic cloves, cilantro and lime juice. Blend until smooth, about 10 seconds.
Transfer the homemade salsa verde to mason jars or other containers. Store in the fridge up to 7 days. See recipe ideas on this post for how to use this salsa verde in a meal. Enjoy!
BROIL OPTION: You can also broil the tomatillos on a silicone mat lined baking sheet under a low broil for 4 to 5 minutes, or until skin begins to blister. Add to blender with other ingredients, as outline above.