Spray a nonstick sauté pan with nonstick cooking spray and place over medium-high heat.
Add onion, red bell pepper, and garlic. Sauté 5 minutes, stirring frequently.
Add turkey and saute 5-7 minutes, stirring frequently until turkey is just cooked through.
Add tomato paste, mustard, hot sauce, tomatoes, honey, and black pepper. Bring to a simmer 5 minutes, stirring frequently.
Toast the hamburger buns. Fill each bun with 1/2 cup turkey mixture to make 8 sandwiches.