Quinoa and Sweet Potato Enchilada Casserole

INGREDIENTS

1 tsp

olive oil

1/2 cup

finely minced red onion (you can also chop ½ cup onion for the casserole)

2 cloves

garlic, minced

1 tbsp

chili powder

1/2 tbsp

cumin

1/4 tsp

salt

15 oz

can tomato sauce

1/2 cup

water

1 cup

uncooked quinoa, rinsed well

small sweet potatoes, peeled and cut into ½-inch cubes (about 2 cups)

15 oz

can black beans, rinsed and drained

2 cups

grated cheddar cheese

1/2 cup

finely chopped red onion

1/4 cup

chopped fresh cilantro, plus more for garnish

Greek yogurt or sour cream, for serving (optional)