Savory BBQ Tacos with Avocado

-1 1/2 Tbsp. olive oil

-2 small onions, separated and diced

-1 large clove garlic, minced

-2 1/2 Tbsp. tomato paste

-1 tsp. cumin

-2 tsp. chili powder

-1/4 tsp. cayenne pepper

-Cinnamon,

-2 tsp. brown sugar

-2 scant Tbsp. soy sauce

water

-1/2 lime, juiced

-1 (15oz.) can pinto beans, drained

-1 avocado, sliced and sprinkled with salt

-1 cup of spinach

-4 soft, whole wheat 10-inch taco shells