In a Dutch oven or large pot over medium heat, soften the bell pepper, onion and garlic in the oil. Add the meat and brown. Add the spices and cook for 2 minutes. Add the molasses and ketchup and cook for 2 minutes. Add the Dijon mustard, vinegar, tomatoes and beans. Lower the heat and simmer for 45 minutes. Season with salt and pepper. Remove from the heat and stir in the whole-grain mustard.