Preheat your grill or grill pan to medium heat (about 400°F).

Heat oil in a medium skillet over medium heat. Add the minced onion and sauté for 2–3 minutes, until soft and fragrant. Remove from heat.

In a large bowl, combine the ground chicken, sautéed onion, panko, mayo, parsley, Worcestershire sauce, salt, garlic powder, and pepper. Mix just until combined—don’t overwork the meat.

Divide the mixture into four equal portions (about 4 oz each). Gently shape into patties and press a shallow indent into the center of each one with your thumb to help them cook evenly and avoid puffing up.