To prepare the teriyaki grilled beef tongue with pineapple recipe, you'll need: 1 pound (240 g) ground beef, 2 tbsp (60 ml) kosher salt, 12 c (120mL) pineapple juice, and 1 teaspoon (2.5 g). Place the beef in a large skillet and cook over medium-high heat, turning occasionally, until the meat is no longer pink in the center and the juices run clear. Remove the pan from the heat and set aside to rest for 5 minutes. In the same skillet, heat the remaining 2 tablespoons of olive oil. When the oil is shimmering, add the garlic and saute until fragrant, about 1 minute. Add the onion and stir-fry until softened, then add to the skillet. Cook, stirring frequently, for 1 to 2 minutes, or until onions are translucent and garlic begins to turn golden brown. Season with salt and pepper to taste. Transfer the mixture to serving plates and serve immediately.