Prep all vegetables per instruction above.
Prep the chicken: In a bowl, mix the oil, lemon juice, garlic powder, and oregano. Add the chicken and toss until fully combined. Season with salt and pepper.
Preheat a grill or grill pan on medium heat.
Thread the chicken, zucchini, peppers, and onion onto the wooden skewers, alternating each ingredient.
Grill the skewers on one side until nicely charred then brush with any remaining marinade, grill on the other side to an internal temperature of 160°F (71°C) using a thermometer.
Make the heirloom toast: In a medium bowl, combine the tomato, cucumber, olive oil and oregano; season with salt and pepper.
Smear the cream cheese on the crispbread and top with the tomato-cucumber mixture. Drizzle with the balsamic glaze.
Serve: Plate the kabobs, enjoy with the heirloom tomato toast and sparkling water.