Preheat oven to 350 degrees. Cut peppers in half length-wise and remove seeds and stems. Arrange peppers in oven safe dish, cut side up.
In a large pan, heat olive oil over medium-high heat. Add onions and garlic and sauté until fragrant and slightly tender.
Add ground turkey and season with Emeril's Cajun Seasoning. Cook turkey while continuing to break apart with a spatula until cooked through. Mix in black beans, corn, jalapeño, salsa and quinoa.
Stuff peppers with turkey mixture. Pour broth into bottom of baking dish. Cover dish with foil and bake at 350 degrees for 25-30 minutes or until peppers are tender.
Uncover dish and top stuffed pepper halves with 1 tbsp cheese each. Continue cooking uncovered for 5 minutes or until cheese is melted.