Place the fresh sage, garlic, red pepper flakes, olive oil, mustard, honey, balsamic vinegar, coarse salt, and black pepper in a food processor or blender. Puree into a paste.
Place the marinade in a zip lock bag. Add the chicken & massage the thighs. The chicken can be refrigerated and marinated overnight or left on the counter for up to 2 hours.
Bring the chicken to room temperature.
Preheat grill to high. Turn the grill down to MEDIUM LOW heat.
Grill the chicken for 5 minutes turn and cook for 5 minutes. Turn the thighs and grill for 5 more minutes and then finally another 5 minutes (Total time 20 mins- 5,5,5,5 a side). Check the chicken is cooked through.
Serve with roasted potatoes and some grilled corn.
SERVES 4
You can use boneless chicken breast instead-but increase the cooking time (6,6,6,6 minutes or 7,7,7,7 minutes) depending on the size of the breasts