Place turkey into a large bowl with egg, salt, pepper, parsley, poultry seasoning and milk. Stir to combine. {Mixture may seem a little wet, but once it starts cooking, the egg will help hold it's shape together.}

Preheat indoor griddle to medium-medium high heat.

Divide meat into 4 even patties. Cut butter into skinny half tablespoon pats. Press butter into the center of each patty forming the meat around it.

Spray griddle pan with nonstick cooking spray and place each burger down onto the griddle. Cook about 4 minutes per side or until browned and completely cooked. Feel free to melt cheese on top of each burger. {Place cheese onto cooked side of the burger and cover with a large pot lid or foil for 1 minute to melt cheese.}

Remove burgers and place onto buns. Top with any desired toppings and condiments and serve.