Add the ground turkey, Dijon, tarragon, onion powder, egg, breadcrumbs, grated apple, shallot, salt and pepper to a large mixing bowl. Combine the ingredients thoroughly.
Divide the mixture in half. Form half the mixture into 4 equal burger sized patties and the other half into 14 small meatballs. Transfer the burger patties and meatballs to a container and store in the fridge for a minimum of 30min up to 24hr.
Preheat the BBQ to 400°F.
Place the burgers and meatballs on the BBQ and cook, turning occasionally until they are fully cooked through (165°F) The meatballs will take roughly 8 mins and the burgers will take 15 mins.
Serve the burgers on toasted buns topped with apple slices, cheddar, mustard and mayonnaise or any accompaniments you prefer.
Notes
Double the recipe and make an extra-large batch of burgers and meatballs. Freeze cooked burgers or meatballs for future use.*Store the meatballs in the fridge and serve on top of a power bowl, stuffed into a pita or as a snack eaten straight up.