In a bowl, combine the beef tenderloin with Worcestershire sauce and paprika (if using). Mix well, ensuring all the beef cubes are coated. Let it marinate for at least 30 minutes.

Heat the olive oil in a pan over medium heat. Add the sliced garlic and sauté until golden brown. Once browned, remove the garlic from the pan and set it aside.

In the same pan with the garlic-infused oil, add the marinated beef cubes. Sear the beef on all sides until they are browned.

Once the beef is browned, lower the heat and add the butter, minced garlic, soy sauce, oyster sauce, black pepper, and a pinch of salt. Stir well.

If you prefer a slightly sweet touch, add 1 tbsp of brown sugar at this stage. Continue to cook for an additional 2-3 minutes until the beef is cooked to your desired doneness and the sauce is well combined.

Transfer the beef salpicao to a serving plate. Garnish with the browned garlic slices and chopped green onions.

Serve with steamed rice and enjoy your flavorful Beef Salpicao!