Step 1

In a large bowl, stir together breadcrumbs and milk; let stand to absorb.

Step 2

Heat oil in a large saucepan over medium heat, then cook onion with ¼ tsp salt until softened, about 7 minutes. Add garlic and cook until fragrant, about a minute more. Cool for a few minutes, then scrape into breadcrumb mixture.

Step 3

Stir mayo into the breadcrumb mixture, along with parsley, remaining salt, pepper, and cayenne.

Step 4

When mixture is cool to the touch, stir in the egg then the ground chicken. Use your hands to gently but thoroughly work the mixture together. Using oiled or slightly-dampened hands, form into 6 burger patties. It’ll seem quite soft at this point. Chill the patties for 20 minutes to firm up.

Step 5

If grilling: Preheat grill to medium-high heat and oil the grates. Grill the patties for about 6-7 minutes per side, or until the internal temperature reaches 165ºF.

Step 6

If pan-cooking: Heat a tablespoon of oil in a skillet over medium heat. Add the patties and cook for about 6-7 minutes per side, or until the internal temperature reaches 165ºF.

Step 7

Let burgers rest for a few minutes before serving.