- ½ cup onion
- 1 pound ground beef chuck
- 2 tablespoons canned chipotle chiles in adobo, including sauce
- 4 English muffins or hamburger buns
- 1 teaspoon salt
Prepare grill for cooking over medium-hot charcoal (moderate heat for gas); see "Grilling Procedure," below. Meanwhile, open any whole chipotles and discard seeds, then mince chipotles. Mix chipotles (with sauce), beef, onion, and salt with your hands, then form mixture into 4 (3/4-inch-thick) pa...