Remove the husks from tomatillos and rinse. Slice in half and lay on a baking sheet covered with a silpat or parchment paper.
1 1/2 pounds tomatillos
Peel and quarter onion and add to baking sheet. Halve serrano peppers, discarding ribs and seeds. Add to baking sheet.
1 small onion, 2 serrano peppers
Broil 5 minutes, then remove serranos. Flip tomatillos and onion so the other side can char a bit. Return to the oven to broil for another three minutes.
While the items are roasting, smash garlic cloves and remove the skin.
Add chicken stock, lime juice, salt, garlic, onion, and serrano peppers to blender. Blend until smooth.
Feel free to use just one serrano if you like things less spicy. Adjust the lime juice to your taste. More lime juice will also reduce the spiciness of the salsa.
For more tips and tricks, be sure to read the full article above.