To prepare a yakitori don, you'll need: 1 pound ground beef, 2 tbsp teriyaki sauce, 1/2 cup scallions, 1/4 cup sesame seeds, 1 cup water, and 1 teaspoon kosher salt. Heat 1 tablespoon of vegetable oil over medium-high heat. Add the beef and cook, stirring occasionally, until browned on all sides, 5 to 7 minutes. Remove from the heat and set aside to cool. Cut the meat into 12 inch (1.27 centimeters) thick slices. Toss the sliced meat with the soy sauce and ketchup. Season with salt and pepper to taste. Serve with rice.