Get your grill going so that you have medium indirect heat available - about 375 degrees.
Spatchcock the chicken and reserve the backbone.
Salt and pepper the chicken liberally.
Place the chicken on the grill with skin side up and cook through until the chicken reaches 165 degrees, which typically takes 45 minutes to an hour depending on the size of the chicken. Rotate the chicken 180 degrees halfway through cook time.
While the chicken is cooking, you can make the sauce on the grill right next to the chicken.
Add the chicken backbone, oil and garlic scapes to a sauce pan on the hot side of the grill and cook until the scapes are tender, about three minutes.
Next add the onion and cook until tender.
Add the garlic and cook through until the garlic is fragrant.
Then add the mushrooms, cook for another three minutes.
Pour in the wine and add the thyme bunch and stir. Cook until the wine liquid is reduced by half.
Mix the flour and butter together in a small bowl to make Beurre ManiƩ, add this to the sauce and mix well. Cook just another few minutes until the sauce thickens.
Add salt and pepper to taste.
Carve the chicken into pieces and serve topped with the sauce. Garnish with fresh parsley if you're like my husband and need garnishes for the photo opp. :)