Preheat oven to 350ºF. Prepare large baking dish (9x13) by spraying lightly with nonstick spray.
Bring large pot of salted (2 teaspoons) water to boil. Carefully lower bell pepper halves into boiling water. Boil (blanch) peppers 5 minutes. Remove with slotted spoon or tongs; put on rack, cut sides down, to drain and cool.
Meanwhile, combine the rest of the ingredients in a large mixing bowl, stirring well to distribute spices.
When peppers are cool enough to handle, spoon filling into each pepper half, mounding the filling. You may not need all of the filling. Sprinkle additional cheese on top, if desired.
Place filled peppers in preheated oven and bake 40 minutes or until heated through.
Serve with desired toppings.
Video
Notes
Use any color bell peppers that you like: green, yellow, orange, red, or large poblano peppers.
Instead of adding chili powder and cumin, you could add 2 ½ teaspoons of southwest spice blend.
Nutrition information is for one filled pepper half, and does not include optional toppings.