Place chiles, tomatoes, shallots, and garlic cloves on a baking sheet. Broil vegetable mixture for 10 minutes or until charred, turning once after 5 minutes.
Remove chiles from pan.
Place in a paper bag; fold to close tightly.
Let stand 15 minutes.
Remove skins, tops, and seeds from chiles; discard.
Remove skins from garlic; discard.
Place chiles, garlic, tomatoes, shallots, cilantro, lime juice, and kosher salt in the bowl of a food processor; pulse 10 times or until mixture is well combined.
