2 tablespoons canned chipotle chiles in adobo, including sauce
1 lb ground beef chuck
1/2 cup finely chopped onion
1 teaspoon salt
Open any whole chipotles and discard seeds, then mince.
Mix chipotles (with sauce), beef, onion, and salt with your hands, then form
mixture into 4 patties.
Grill burgers on lightly oiled grill rack
turning over once, 4 minutes total for medium-rare.
Grill English muffins or buns, cut sides down, until grill marks appear,
about 30 seconds.