Heat a large sauté pan and melt butter, add garlic and sauté until golden in color, add spinach and allow to wilt, then season with salt and pepper. Remove garlic-spinach pepper stuffing from sauté pan and allow to cool for 15-20 minutes.
Butterfly chicken breast, opening it up into 2-3 folds. Season with salt and pepper.
Layer the following ingredients in the chicken breast (in order): pepper jack cheese, roasted pepper and sautéed garlic-spinach pepper stuffing. Then, fold and tie with butcher’s twine.
Brush roll-tied chicken breast with olive oil, then season with salt and pepper.
Heat grill to medium-high and spray grates with non-stick spray (or brush with oil).
Place stuffed chicken breast on hot grill. Grill for 1 ½ minutes, pick up and turn 90 degrees to create grill cross marks. Grill chicken breast for another 1 ½ minutes, turn over and then cover grill. Cook covered for 10-12 minutes. Pro Tip: If the twine is becoming charred, place chicken breast on sheet of aluminum foil and continue cooking until internal temperature reaches 165°.
Remove from grill and allow to rest 4-5 minutes, remove twine and serve.