Black Bean and Sweet Potato Tacos with Avocado Crema - The Scramble

Ingredients

• 2 small or 1 large sweet potato (peeled and finely diced (about ¾ lb.))
• 1 Tbsp. extra virgin olive oil
• 1 tsp. chili powder
• 1/2 tsp. ground cumin
• 5/8 tsp. salt
• 5/8 tsp. black pepper
• 30 oz. reduced-sodium canned black beans (drained and rinsed, or use 3 cups homemade black beans)
• 1/4 tsp. garlic powder
• 1 avocado
• 1/2 cup low fat plain yogurt (or use any variety)
• 1/2 lime (juice only, about 2 Tbsp.)
• 1 clove garlic (minced, about 1/2 tsp. )
• 12 corn tortillas
• 1 cup shredded Monterey Jack cheese (for serving (optional))