Remove the husks from the tomatillos and wash them in warm water to remove the sticky residue.
Place the dried tomatillos, poblano peppers, jalapeno pepper, and onion slices on a baking sheet. Drizzle them with oil, then season with sea salt to taste. Toss to coat evenly.
Place the garlic cloves in a small piece of foil, drizzle them with oil, seal tightly, and place them on a baking sheet.
Place in the oven and roast, flipping them halfway through roasting, for 20 minutes. The tomatillos should be softened, and the peppers & jalapeno should be tender and their skins browned. Remove from the oven.
Place the poblano peppers in a large zip-lock bag and seal it; set aside for 10 minutes to steam.
Remove the stems and outer skin of the poblano along with the interior seeds. Set aside to allow all of the roasted vegetables to cool.
Remove the garlic from the foil and discard the skins.
Once all the vegetables are cooled, add them to a food processor with the fresh cilantro, lime juice, cumin, sea salt, and freshly cracked pepper, to taste.
Pulse until everything is evenly chopped. Taste and add more lime juice or salt if needed.
Pour the salsa into an air-tight container or glass jar and store it in the refrigerator until needed. Enjoy.