• Let’s dive in and unravel the cooking process. It’s simple, yet the result is impressive. You’ll be serving a dish worthy of a special occasion!

Step 1: Prep the Beef

• Start by slicing the beef tenderloin thinly. A sharp knife helps here! After cutting, place it in a bowl and add light and dark soy sauce, along with ground black pepper. Toss it well and let the beef marinate for at least 30 minutes. This step is crucial and allows the flavors to meld.

Step 2: Sauté the Garlic

• In a hot skillet with cooking oil, add the minced garlic. Allow it to sizzle until fragrant. For me, this aroma is the essence of any great dish.

Step 3: Cook the Beef

• Once the garlic is golden, increase the heat and throw in the marinated beef. Stir and cook until the beef turns brown. You want that sear! This enhances the flavor.

Step 4: Add the Mushrooms

• Next, it’s time for the mushrooms to shine. Add them to the skillet and cook until they soften. They should absorb the garlic and beef flavors beautifully.

Step 5: Create the Sauce

• Now, let’s thicken things up! In a separate saucepan, melt the butter. Whisk in all-purpose flour and cook until it’s slightly browned.
• Gradually add water while continually stirring to avoid lumps. Then, add soy sauce, pepper, the beef bouillon cube, and fresh thyme. Stir well until fully mixed.

Step 6: Combine Everything

• Pour the sauce over the beef and mushrooms, allowing it to simmer for a few minutes. Add sesame oil for that final touch. The sauce should coat everything, creating a luscious finish.