Heat 1 1/2 tablespoons oil in a large nonstick skillet over medium heat. Cook 4 patties, turning once, until golden brown and crispy, 5 to 7 minutes on each side. Transfer to a serving platter and repeat with the remaining 1 1/2 tablespoons oil and 4 patties. (Alternatively, preheat an air fryer to 375°F for 5 minutes. Coat the basket with cooking spray; place 4 patties in the basket and cook until lightly browned, 5 to 7 minutes. Flip, and cook until golden brown and crispy, 5 to 7 more minutes. Coat the basket with cooking spray again and repeat with the remaining 4 patties.) Garnish with basil and serve hot.