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Dinner · Part 2 of 3: Instructions

Saucy Pepper Steak Stir-Fry for a Quick Dinner Step-by-step instructions

A close-up shot of a saucy pepper steak stir-fry in a black skillet with vibrant red peppers and onions.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Before starting, ensure all ingredients are prepped, sliced, and ready to go. Stir-fry cooking moves very quickly, and having your beef sliced against the grain, your peppers and onions cut into strips, and your sauce measured out will prevent any stress during the cooking process.

Keep your skillet near the stove and have your tongs or a spatula ready to handle the ingredients efficiently. Preparing everything in advance is the secret to a smooth, enjoyable cooking experience.

Ingredients at a glance (4)
  • 1 lb flank steak, sliced into thin strips
  • 2 red bell peppers, sliced
  • 1 yellow onion, sliced
  • 1/4 cup soy sauce

Instructions

Searing the beef

  1. Sear the beef
    Add the beef strips in a single layer to a hot skillet and sear until browned on all sides. Remove the beef from the skillet and set aside on a plate. Let the meat rest for at least 3 minutes to ensure tenderness, ensuring it reaches an internal temperature of 145°F (63°C).
    Look for The beef should be deeply browned and develop a crust.
    Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
    Tip Do not crowd the pan; cook in two batches if necessary for better browning.

The beef should be deeply browned with a visible crust. The skillet will be hot, and you will hear a distinct sizzle as the meat hits the surface. Ensure the beef is not crowded in the pan, as this is the most important step for developing the flavor base of the entire dish. Once browned, remove it immediately to prevent overcooking, as it will finish cooking later.

Sautéing the vegetables

  1. Sauté the vegetables
    In the same skillet, add the sliced peppers and onions, cooking them over medium-high heat until they begin to soften but maintain a slight crunch. This should take about three to four minutes.
    Look for The peppers and onions should be vibrant in color and slightly softened.
    Tip Keep the vegetables moving constantly to prevent burning.

The peppers and onions should be bright and slightly softened. They should still have a distinct bite to them and look vibrant. The skillet should be clean of any burnt bits from the beef, and the vegetables should be tossed constantly to ensure even cooking. This phase is about developing a sweet, tender profile for the aromatics and peppers before the final assembly of the dish.

Combining and finishing

  1. Combine and sauce
    Return the cooked beef to the skillet with the vegetables. Pour in the soy sauce and toss everything together over the heat for one minute until the sauce thickens slightly and coats all ingredients evenly.
    Look for The sauce should look glossy and cling to the beef and vegetables.
    Tip Ensure the sauce is well distributed to coat every piece of beef and vegetable.

The sauce should be bubbling and glossy, coating the meat and vegetables completely. The dish will smell savory and aromatic. Check that the beef is heated through and the sauce has thickened to your desired consistency.

The final product should look cohesive and inviting, with the sauce sticking to the ingredients rather than pooling at the bottom of the skillet. Serve it hot immediately for the best texture.

Common mistakes

A common mistake is overcrowding the skillet, which lowers the temperature and causes the beef to steam instead of sear, resulting in a grey, tough texture. Another error is overcooking the vegetables, which makes them limp and loses their fresh, crisp bite.

Always keep the heat high and work in batches if your pan is not large enough. Finally, failing to slice the beef against the grain will make the meat difficult to chew, regardless of the cooking time.

How to tell it’s done

The beef is done when it is browned on the outside and reaches an internal temperature of 145°F (63°C). Because the pieces are thin, this happens quickly. It is vital to remove the pan from the heat and allow the beef to rest for at least 3 minutes before serving.

This resting period allows the juices to redistribute throughout the meat, ensuring that every bite is tender, juicy, and flavorful rather than tough or dry.

  • Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest

Coming up in Part 3: common questions

  • Can this be made ahead of time?
  • What is the best cut of beef to use?
  • Why does the beef turn out tough?

Also in Part 3: variations (Spicy Pepper Steak, Ginger-Garlic Twist), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)