Arrange cabbage slices on a rimmed sheet pan. Brush a little oil on the cabbage slices & season with salt & pepper.
Roast cabbage slices for about 10 minutes to precook them slightly to prevent over cooking the burgers.
In a large bowl, combine ground meat, garlic, green onion, parsley, red pepper flakes half the cheese, salt & pepper. Form the mixture into 4 patties.
Remove the cabbage from the oven & spread a Tbsp of tomato sauce (or salsa) on top. Add a sprinkle of shredded cheese the top with a meat patty. Finally, sprinkle another layer of shredded cheese.
Bake cabbage burgers for 10-12 minutes or until burgers are cooked to your liking & the cheese is melted & bubbly. Serve immediately.