Preheat oven to 450°
Prepare your ingredients. Quarter your onion, remove the husk from your tomatillos and rinse them off to remove any sticky residue.
Place your onion, tomatillos, jalapeño and garlic onto a large sheet pan and drizzle with olive oil.
Roast for 20 minutes flipping everything halfway through to ensure both sides of your ingredients brown evenly.
Now add your roasted tomatillos, onion, cilantro, lime and salt to your food processor. Remove the skin of the garlic and only use the soft roasted portion. Add to your food processor.
Cut your jalapeño in half and remove the seeds as well as the stem. Add to your food processor.
Slowly pulse until everything comes together. You will want it slightly chunky but still processed enough to combine the ingredients.
I like this salsa thick just as it's made. If you prefer a thinner salsa you can add a bit of water. Add small amounts and pulse until desired consistency.
Taste and adjust flavors as needed. Serve with chips or on your favorite dishes.
Enjoy!