Place the lemon and orange juice and zest, rosemary needles, garlic, mustard, olive oil, coarse salt, black pepper & red chilli flakes 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 on high.
Turn the grill down to medium heat. Add the chicken to the grill & place the lemons, flesh side down on the grill. Grill the thighs for 5 minutes then turn them over and grill for another 5 minutes. Turn again and grill for another 5 minutes. Check the chicken is cooked through.
Serve with roasted potatoes and garnish with the caramelized lemons.
SERVES 6-8
You can use boneless chicken breast instead-but increase cooking time (6,6,6 minutes or 7,7,7 minutes) depending on the size of the breasts.