Step 1: Prepare the Steak

1. Pat the steak pieces dry with a paper towel to remove excess moisture. This helps achieve a nice sear.
2. Season the steak cubes evenly with salt and black pepper. Set aside.

Step 2: Heat the Pan

1. Heat a large cast-iron skillet or wok over medium-high heat until very hot. Add the vegetable oil and sesame oil, ensuring the pan is evenly coated.
2. Allow the oil to heat for about 30 seconds. The oil should shimmer when ready.

Step 3: Sear the Steak

1. Place the seasoned steak cubes in the pan in a single layer, being careful not to overcrowd the skillet. Sear the steak for 2–3 minutes on one side until a deep golden-brown crust forms.
2. Flip the steak cubes and sear for an additional 1–2 minutes on the other side.

Step 4: Add the Garlic Butter Sauce

1. Reduce the heat to medium. Push the steak cubes to one side of the skillet. Add the butter to the empty space in the skillet and allow it to melt.
2. Stir in the minced garlic and cook for 30 seconds until fragrant. Add the soy sauce and lemon juice, stirring to combine.
3. Toss the steak cubes in the garlic butter sauce until evenly coated.

Step 5: Garnish and Serve

1. Remove the skillet from the heat. Sprinkle the steak with sesame seeds and sliced green onions for garnish.
2. Serve immediately with fried rice, hibachi noodles, or steamed vegetables.