Add ground turkey and shallot to a large skillet over medium-high heat. Season liberally with salt and pepper then cook until no longer pink, breaking turkey up as it cooks. Add garlic then cook for 30 more seconds then add to a 6 quart crock pot. Add remaining ingredients, except toppings, into crock pot then cook on high for 3 hours, or low for 5-6 hours, or until sweet potatoes are tender. Serve with toppings. May need to add more chicken broth when reheating.