Season beef: Add beef to a bowl and season with pepper. Set aside.
Make the sauce: In another bowl, whisk together Worcestershire sauce, Knorr Liquid Seasoning, soy sauce, and sugar.
Cook garlic: Heat oil in a pan over medium-high heat until it begins to shimmer. Add minced garlic and cook until pale golden brown. Transfer garlic to a paper towel-lined plate.
Cook beef: In the same pan, add the beef to the garlic oil. Sear the beef on all sides until well browned. Add sauce mixture and butter. Cook until liquid is reduced and beef is cooked through. Add half of the crispy garlic into the salpicao and stir.
Serve: Transfer salpicao to a serving platter and garnish with remaining fried garlic.
