Preheat oven to 200F (93C). Line a rimmed baking sheet with a cooling rack and set aside.
Mix together all ingredients but oil in a large bowl. With damp hands, form mixture into twelve generous 1/4-inch (1/2-cm) thick patties. Place on a plate and set aside.
Heat 1 tablespoon (15ml) of oil in a large non-stick skillet over medium heat. Working in batches of six, cook patties until browned and meat is cooked through (165F, 74C), about 6 to 8 minutes flipping halfway. Turn heat down to medium-low if patties are browning too quickly. Wipe pan down with a paper towel in between batches and add more oil before adding remaining patties.
If not serving immediately place cooked patties on baking sheet, and keep in preheated oven.