Combine ground chicken, panko breadcrumbs, egg, mayonnaise, and all seasonings in a large bowl. Gently mix with your hands until just combined—overmixing creates tough patties. The mixture should feel moist and hold together easily.

Divide mixture into 12 equal portions and shape into small patties slightly larger than your slider buns. Create a small indent in each patty's center with your thumb—this prevents puffing during cooking and ensures even thickness.

Heat a large skillet or griddle over medium heat with a drizzle of oil. Cook patties for 4-5 minutes per side until golden brown and internal temperature reaches 165°F.

Place cheese slices on patties during the final minute of cooking. Cover skillet briefly to melt cheese perfectly.

Lightly toast slider buns in the same skillet for extra flavor. Layer lettuce, chicken patty, tomato, pickles, and sauce on each bun.