Preheat Wolf outdoor grill on medium high heat for 10 minutes.
One day prior soak the wooden skewers in water to keep them from burning on the grill.
In a medium bowl combine the chicken, parsley, oil and season with salt and pepper.
To make the brochettes, alternate the chicken, peppers and onions on a wooden skewers. Top the skewers with a tomato and a mushroom. Continue the process to make 6 brochettes.
Place the brochettes onto the grill grates and let cook for 3 minutes on each side, while closing the door in between turns.
Remove from the grill and place onto serving platter. Squeeze the lemon juice over the brochettes and serve.