Black Bean Casserole with Quinoa

0 Cook quinoa according to package directions. Meanwhile saute onion, peppers, corn, cumin, salt, black beans and green chiles in a pan.
1 While that's cooking, make the sauce: combine the tomato sauce, vegetable broth, chili powders (all 3 of them), garlic powder, onion powder, and dried oregano in a medium sauce pan over medium heat. Whisk to combine, then turn the heat down to low and let simmer 5 minutes.
2 Mix quinoa, sauce and half of the cheese in the pan with the black bean / veggie mixture.
3 Transfer the mixture to a casserole dish, top with cheese, and bake at 375 degrees for 15 minutes, or until the cheese is melted and bubbly.
4 Top with diced tomatoes and green onions.