Barbecued Chipotle-Marinated Pork Sandwiches | Food Stuff

Ingredients

• 1 chipotle chile in adobo sauce plus 1 teaspoon adobo sauce (see Tips)
• 1/3 cup prepared barbecue sauce
• 1 teaspoon canola oil
• 1 clove garlic, minced
• 1/2 teaspoon ground cumin
• 8 ounces pork tenderloin (see Tips), trimmed
• 3 tablespoons lime juice
• 1/2 cup orange juice
• 1 teaspoon dried oregano
• 1/4 teaspoon freshly ground pepper
• 1 tablespoon red-wine vinegar
• 1/4 teaspoon salt
• 2 whole-wheat buns, split horizontally
• 1 small yellow onion, cut into 1/2-inch-thick rounds