This recipe requires refrigerating the chicken for a couple hours before grilling. Make the rub in the morning, apply it to the chicken, and refrigerate for at least 2 hours while you go about your life.
Using a sharp knife or kitchen shears, cut the backbone out of the chicken, slicing down both sides of the backbone and removing it. Freeze the backbone to make broth in the future.
Place the chicken on its back and squash it to open it and flatten it.
To Make and Apply the Rub
Using a small food processor, puree the onion, garlic, salt, pepper, herbs, olive oil, and lemon until smooth.
Spread the puree under the breast skin and over the entire bird. Or simply spread it over the top of the breast.
Refrigerate for several hours (up to 8).
To Cook
Remove the chicken from the refrigerator and wipe off most of the rub (if it hasn't drained to the pan).
Let the chicken rest at room temperature for 30 minutes.
Heat the grill to medium high heat (around 400 degrees)
When the grill is hot, turn the middle burner off and place the chicken in the center, breast side down, and close the top of the grill.
Cook for 15-25 minutes using this indirect heat method until charred and then flip the chicken to its back.
Cook for another 15-25 minutes (more or less, depending on your grill), covered, until the thickest part of the chicken breast reaches an internal temperature of 165F degrees.