1 cup uncooked barley
1/4 cup lime juice
2 Tbsp water
1 Tbsp canola oil
1 tsp sugar
1/2 tsp garlic powder
1/4 tsp salt
1/4 tsp black pepper
1/4 tsp cayenne pepper
1/4 tsp ground cumin
15 oz can black beans, rinsed and drained
2 cups leaf lettuce
1 medium tomato, chopped
1 small onion, chopped
1/4 cup shredded low-fat cheddar cheese
1/4 cup sliced green onions