01 -
In a small dish, stir together all the Rub ingredients. You’re aiming for a thick and moist paste.
02 -
Dry the whole turkey breast using paper towels. Spread the Rub all over, concentrating most on the top and sides.
03 -
Lay the onion, thyme, and garlic cut-side down inside the slow cooker. Rest the turkey breast on top so it’s raised up.
04 -
Set your slow cooker on LOW and cook for 6 hours, or until the thickest part of the turkey hits 165°F (75°C). Start checking around 5 hours if possible.
05 -
Take the turkey out after cooking (don’t leave it on Warm). Leave it to sit undisturbed for about 20 minutes, giving the juices time to settle.
06 -
Turn the oven broiler/grill on high. Move an oven rack to 12 inches / 30 cm below the heat. Transfer the turkey to a heat-safe serving dish. Broil for 3 to 5 minutes till the skin turns golden and crunchy, watching closely to avoid burning.
07 -
Pour the cooking juices from the slow cooker into a jug, squeezing the garlic and other bits to release all their flavor. Add chicken stock if needed to make 2 cups.
08 -
Melt butter in a pot over medium heat, stir in the flour, then mix in a little of the liquid (about 1/2 cup). Keep adding the liquid gradually while stirring constantly. Smooth out lumps with a whisk if needed. Let it thicken while simmering, but take it off just before it reaches your preferred consistency—it’ll thicken a bit more off the heat.
09 -
Taste the gravy and adjust the salt and pepper as needed. Serve the turkey with the gravy on the side.