1. Soak the beef in water for 30 minutes to remove the blood, cut into small pieces and put it into the Joyoung Broken Cooking Machine, select the "Stirring" mode, and beat into beef puree
2. Add minced onion, salt, black pepper, egg white and cornstarch to beef puree, and use chopsticks to beat in one direction.
3. The beaten beef mash is patted into n patties with a thickness of about 1cm
4. Heat the pan, pour in the right amount of olive oil, add the meatloaf, fry on medium heat for 3 minutes, turn over, spread a slice of cheddar cheese on the meatloaf and continue frying for 3 minutes
5. Cut the hamburger buns, put the cut sides into the pan and fry until golden; slice the pineapples, put them in the pan and fry on both sides for 30s
6. Put lettuce, Thousand Island sauce, pineapple, beef patty, tomato, lettuce, Thousand Island sauce in the bread, fix with toothpicks, and enjoy
