Cook the bulgur wheat by combining it with 0.5 cup water in a small saucepan, bringing to a boil, then simmering covered for 12 minutes until the liquid is absorbed.
Season the chicken breast evenly with half of the sea salt, black pepper, and garlic powder.
Slice the zucchini into rounds, the bell pepper into wide strips, and the red onion into thick wedges.
Lightly coat the vegetables with a small portion of the olive oil and the remaining seasonings.
Grill the chicken over medium-high heat for 6 minutes per side until the internal temperature reaches 165 degrees Fahrenheit.
Grill the vegetables for 3-4 minutes per side until they develop char marks and become tender.
Slice the grilled chicken into strips and roughly chop the grilled vegetables into bite-sized pieces.
In a large mixing bowl, whisk together the remaining olive oil, lemon juice, and chopped parsley to create a dressing.
Add the cooked bulgur, grilled chicken, and vegetables to the bowl, tossing thoroughly to coat everything in the dressing before serving.