Tex-Mex Pulled Chicken Sandwich - American Institute for Cancer Research

Ingredients

• 1 cup no-salt-added tomato sauce
• 1 Tbsp. no-salt-added tomato paste
• 1 Tbsp. Worcestershire sauce
• 3/4 cup onion, finely chopped
• 3 garlic cloves, finely chopped
• 1-2 canned chipotle peppers, finely chopped
• 1 Tbsp. adobo sauce from canned chipotle pepper
• 2 tsp. ground cumin
• 1/4 tsp. salt
• 1/4 tsp. freshly ground pepper
• 2 lbs. skinless and boneless chicken thighs, fat trimmed
• 2 poblano peppers, halved and seeded
• 1 large onion, halved and cut crosswise into ½ -inch slices
• 6 whole-wheat hamburger buns, split