Chinese-Inspired Hamburger with Sweet and Sour Sauce

Method

1. In a large bowl, mix ground beef with soy sauce, oyster sauce, garlic powder, ginger powder, salt, and pepper.
2. Form 4 equal-sized beef patties and cook on a grill or skillet over medium-high heat until desired doneness, about 4-5 minutes per side.
3. While the patties cook, mix ketchup, rice vinegar, sugar, and cornstarch in a saucepan. Cook over medium heat until thickened, about 5 minutes.
4. Place cheese slices on top of each cooked patty and let sit for 1 minute to melt.
5. Assemble burgers with tomato, lettuce, and buns.
6. Serve with sweet and sour sauce on the side.
7. Check that the ground meat reaches 71°C (160°F) throughout before serving.