Using a paring knife or other small knife, cut around the stems to remove them from the peppers and discard.
Cut the peppers in half and cut out any leftover seeds or membrane.
Preheat the oven to 350 degrees F.
In a large, heavy bottomed skillet over medium-high heat, add a drizzle of canola oil. Once the oil is hot, add in the ground turkey, breaking it apart as it browns.
Once the turkey browns, drain off any excess liquid. Add in enough of the Sloppy Joe sauce to fully coat the ground turkey, reserving a the remainder for topping the rice, if desired. Cook for 2 minutes, and then cover and reduce heat to low.
As the turkey cooks, spray a large, oven-safe dish with nonstick cooking spray and place in the peppers, cut side up. Bake for 15 minutes, or until slightly softened.
Divide the Sloppy Joe turkey meat evenly among the pepper halves. Bake again for 15 minutes. Meanwhile, heat the remaining Sloppy Joe sauce in the same skillet.
Top each pepper half with a slice of cheese and bake one last time, for 5 minutes or until the cheese has completely melted.
Top with chopped parsley or green onion. Serve with brown rice and additional sauce, if desired.