1 teaspoon canola oil
1 medium onion, finely chopped
3 cloves garlic, minced
1 (4-ounce) can chopped green chiles
1 pound lean ground beef
Salt and freshly ground pepper
1 cup canned puréed tomatoes
3/4 cup barbecue sauce
1/2 cup ketchup
1 tablespoon mustard
1 to 2 tablespoons brown sugar
1/2 teaspoon cayenne powder
6 to 8 toasted hamburger buns, to serve
For the slaw:
3 carrots
2 to 3 jalapeños
1/4 small red onion
Salt
1/4 cup to 1/2 cup sour cream