Saucy Pulled Chicken and Rice Tacos recipes

Name: Saucy Pulled Chicken and Rice Tacos recipes
Ingredients: 2 lb (900 g) boneless, skinless chicken breasts (about 4 or 5); 1 can (156 mL/5.5 oz) tomato paste; 1/2 cup (125 mL) packed brown sugar; 1/2 cup (125 mL) malt vinegar; 1 tbsp (15 mL) chili powder; 1 tsp (5 mL) ground cumin; 1 tsp (5 mL) onion powder; 1 tsp (5 mL) garlic powder; 1 tsp (5 mL) ground mustard; 1 tsp (5 mL) paprika; 1/2 tsp (2 mL) salt; 1 cup (250 mL) uncooked medium-grain brown rice; 12 small flour or corn tortillas; 1 head of butter lettuce; 1/2 cup (125 mL) sour cream; 2 green onions, chopped; 1 lime, cut into wedges (optional)