On a large baking sheet, place your pepper halves on them, upright and drizzle olive oil all over them and bake them in the oven at 375 °F (191 °C) for 15-20 minutes or until peppers are blistering and getting slightly translucent around the edges. Set aside.
In the meantime, in a large skillet, saute your onions in a tbsp or two of olive oil until soft. Then add in the ground turkey. Cook the turkey and onions all the way through and then add the taco seasoning. Stir to combine then add in the beans and corn.
Cook for about 5 minutes longer then remove from heat.
Take the (cooled) halves of peppers and place them in a small casserole dish then using a spoon, scoop the filling inside the peppers. Overstuffing is a good thing :)
Sprinkle a good amount of cheese on top of the filling, enough to cover it all, then place under the broiler on high until cheese is melted and bubbly.
Serve immediately.
Notes
You can add quinoa and/or any other ingredient you feel like using in the mixture!