Pre-heat the grill on high heat. Pour oil onto a large plate; set aside. While grill is heating, divide the meat into four sections and form into four patties, about ¾ inch thick. Place patties on top of plate lined with oil and turn once to coat. Sprinkle both sides evenly with Kosher salt and pepper.
Grill burgers over high heat for about 4 minutes per side for medium rare or until you reach desired consistency. Top each burger with one slice of Tillamook Cheddar Sliced Cheese during the last minute of cook time to melt.
While burgers are grilling, whisk together the Sriracha ketchup; set aside.
To serve, wrap each burger in one or two lettuce leaves and top with Sriracha ketchup and desired optional garnishes.