Cook the quinoa according to package directions. Slice the tops of the peppers and clean out the membranes. Set aside.
In a large skillet, brown the lean ground turkey over medium-high heat. Before it is fully cooked add the red onion and garlic and cook until tender. Remove from heat.
Add the tomato paste, black beans, diced tomatoes, sweet corn, quinoa, chili powder, cumin, lime juice, and salt and pepper to taste. Mix well and add 1 cup shredded cheese.
Scoop the mixture into the peppers. Top with the remaining cheese, and bake at 350 degrees Fahrenheit for 20-25 minutes until the peppers soften and the insides are heated throughout.