Mix the chicken marinade ingredients and marinate for at least 30 minutes, preferably 2 to 8 hours.
Thread the chicken onto skewers or cook it as cubes.
Cook the chicken on a grill pan, BBQ, or skillet over medium-high heat for about 10 to 12 minutes total, turning until golden and slightly charred.
Mix the garlic sauce ingredients and let it sit for 10 to 15 minutes so the garlic softens.
Add the rice or quinoa base to the bowl.
Layer the vegetables on top of the base.
Add the hot chicken souvlaki.
Drizzle the garlic sauce generously over the bowl.
Finish with olive oil, oregano, and a squeeze of lemon.