Preheat oven to 375 degrees F.
In a small saucepan combine 1/2 cup quinoa (dry, pre-rinsed) and 2/3 cup water. Bring to a boil over medium-high heat, then reduce heat to low, cover, and simmer for about 15 minutes or until most of the liquid is absorbed and the quinoa is tender.
Remove the pan from heat and let the quinoa sit, covered, for 5 minutes. Fluff with a fork.
In a 9 x 13-inch casserole pan, add the cooked quinoa, 30 ounces black beans (canned, drained), 1 teaspoon cumin, 2 teaspoons chili powder, 1/2 teaspoon black pepper, 1/2 teaspoon kosher or sea salt, and 1 1/2 cups salsa (no sugar added). Stir until evenly combined.
Stir in 3/4 cup of the shredded cheddar cheese (reduced-fat) until distributed through the mixture.
Sprinkle the remaining 3/4 cup shredded cheddar cheese evenly over the top.
Loosely cover the casserole pan with foil and bake in the preheated oven for 30 minutes. Remove the foil and bake an additional 5 minutes, until the cheese is melted and the top is lightly browned.
Let the bake rest for 5 minutes before serving.