Pat the turkey breast dry with paper towels. Give the turkey breast a light coating of avocado oil and season with Traeger Chicken rub on both sides.
Using butcher's twine, truss the turkey breast.
Place the prepared turkey breast directly on the grill grates. Insert a wireless meat thermometer or Traeger probe and cook with the lid closed until the internal temperature reaches 130F.
In a small bowl, mix together the maple syrup, mustard, honey, paprika, black pepper, onion powder, and garlic powder. Separate 2 tablespoons of the sauce to brush on the turkey breast. The rest will be used for the sauce.
Once the internal temperature has reached 130F, increase the heat to 375F and brush the honey mustard sauce mixture all over the brest. Cook the turkey breast until it reaches 160F.
Remove the turkey breast and cover it with foil. Let it rest for 30 minutes before slicing.
Honey Mustard Maple Sauce
Add the honey mustard maple sauce to a small sauce pan set over medium heat. Add the chicken stock and bring the mixture up to a low bubble. Cook the sauce for 10-15 until it reduces by half.
Lower the heat to medium low and add the cream. After 3-4 minutes, turn the heat off and transfer the sauce to a serving dish.