Broil Vegetables: In a dry cast iron skillet, place the tomatillos, onion, garlic, poblano pepper, and jalapeños. Broil for 5-10 minutes, or until the vegetables are tender, blistered, and slightly blackened.
Blend Ingredients: Transfer the broiled vegetables (keep the skins on) to a blender. Add the fresh cilantro, the juice of one lime, and 1 teaspoon of salt.
Process Salsa: Blend on low speed until the ingredients are broken down, but the salsa still retains a slightly chunky texture.
Season and Serve: Taste the salsa and adjust seasoning as needed with additional lime juice (for acidity) or salt. Serve immediately.