In a medium bowl, combine the ground turkey, minced garlic, dried oregano, sea salt, and black pepper until just mixed.
Gently form the mixture into one large, thick patty, being careful not to overwork the meat.
Heat the olive oil in a non-stick skillet or cast-iron pan over medium-high heat.
Place the patty in the hot pan and sear for 5 to 6 minutes on the first side until a golden crust forms.
Flip the burger and cook for another 4 to 5 minutes, or until the internal temperature reaches 165 degrees Fahrenheit.
During the last minute of cooking, place the provolone slice on top of the patty and cover the pan briefly to melt the cheese.
Lightly toast the sprouted grain bun in the pan or a toaster.
Assemble the burger by placing the cheesy turkey patty on the bottom bun, then layering with romaine lettuce, tomato slices, and red onion.