In a large bowl, combine 1 cup orange juice, 3 cloves chopped garlic, 1 tablespoon honey, Dijon mustard, coriander, paprika, salt, and pepper. Whisk until incorporated. Add the turkey breast and flip to coat. Cover and refrigerate 4-6 hours.
When ready to cook, preheat oven to 450F. Remove the turkey from the fridge, transfer it to a tray lined with paper towel and discard the marinade. Pat the turkey very dry with paper towel and try to remove as much garlic as possible to prevent scorching.
Preheat a stainless-steel or oven-safe skillet over medium heat, around 3 minutes. Add the olive oil and heat until shimmering. Place the turkey breast skin-side down and cook, undisturbed, until golden brown, around 6 minutes. Flip the turkey and transfer the pan to the oven. Cook until the thickest part of the turkey reaches an internal temperature of 160F, around 20 minutes. Remove the turkey from the oven, transfer it to a carving board and tent with foil to keep warm.
Discard all but 1 tablespoon of rendered fat in the pan and place it over medium-low heat. Add the shallot and garlic and cook, stirring, 60 seconds. Add the chicken stock and use a wooden spoon to lift any brown bits off the bottom of the pan. Add the remaining 1 cup orange juice, 1 tablespoon honey, and grainy mustard. Cook, stirring, until reduced by ¼ in volume. Taste for seasoning and adjust with salt and pepper as desired. Add the cold butter, if using, and stir through until melted.
Carve the turkey breast into ½-inch slices, transfer to a serving platter and spoon the warm pan sauce over top. Serve with roasted sweet potatoes and blanched green beans.