Go Back
–+ servings
Beef Pepper Onion Stir Fry

Easy Beef Pepper Onion Stir Fry with Bold, Savory Flavors

This Beef Pepper Onion Stir Fry brings bold flavors and satisfaction in under 30 minutes, making it a perfect weeknight meal.
Print Recipe Pin Recipe
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings: 4 servings
Course: Main Course
Cuisine: Asian
Calories: 350
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Stir Fry
  • 1 pound beef sirloin slices Choose tender cuts for quick cooking and maximum juiciness.
  • 1 cup bell peppers (red, yellow, green) Use a mix for vibrant color and a sweet, crunchy bite.
  • 1 medium onion Sliced thin to soften quickly and add natural sweetness.
  • 3 cloves garlic Minced for aromatic depth and a savory punch.
  • 1 inch ginger root Freshly grated to brighten the flavors with a hint of spice.
For the Sauce
  • 1 tablespoon soy sauce The essential umami backbone, balancing salty and savory notes.
  • 1 tablespoon oyster sauce Adds richness and a subtle sweetness to elevate the stir fry.
  • 1 teaspoon sesame oil Just a splash to impart a warm, nutty fragrance.
  • 1 tablespoon cornstarch Stir in to thicken the sauce and help it cling to beef and veggies.
  • 1 tablespoon brown sugar A touch to round out the savory flavors with mild sweetness.
Optional Extras
  • 1 teaspoon red chili flakes Sprinkle in if you like your Beef Pepper Onion Stir Fry with a spicy kick.
  • 2 tablespoons green onions Chop and sprinkle on top for fresh color and mild onion flavor.
  • 1 tablespoon sesame seeds Toast lightly to garnish and add a delightful crunch.

Equipment

  • wok
  • mixing bowl
  • cutting board
  • knife
  • measuring spoons

Method
 

Cooking Steps
  1. Prep the Beef: Trim sirloin of fat, then slice thinly across the grain for maximum tenderness. Pat beef dry with paper towels for a perfect sear.
  2. Marinate Beef: In a bowl, toss beef slices with soy sauce, oyster sauce, and cornstarch. Let sit for 10 minutes to infuse savory flavor.
  3. Heat the Pan: Warm a large wok over high heat until it begins to smoke. Swirl in oil to coat the surface evenly.
  4. Sear Beef: Add marinated slices in a single layer; cook 1–2 minutes per side until browned but still juicy. Transfer beef to a plate.
  5. Sauté Aromatics: Reduce heat to medium, add minced garlic and grated ginger. Stir continuously for 30 seconds until fragrant and lightly golden.
  6. Cook Veggies: Add bell peppers and onions to the wok. Stir-fry for 2–3 minutes, tossing constantly until vegetables are crisp-tender and radiate vibrant color.
  7. For the Sauce: Pour in sauce blend and brown sugar, stirring to combine. Let simmer for 1 minute until the sauce bubbles and thickens into a glossy glaze that coats every piece.
  8. Finish & Serve: Drizzle sesame oil and give a final toss to unify flavors. Transfer to a platter or bowl, then serve over rice or noodles for a warm, satisfying meal.

Nutrition

Serving: 1servingCalories: 350kcalCarbohydrates: 20gProtein: 25gFat: 15gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 70mgSodium: 900mgPotassium: 600mgFiber: 2gSugar: 4gVitamin A: 20IUVitamin C: 60mgCalcium: 4mgIron: 15mg

Notes

Optional: Sprinkle chopped green onions and toasted sesame seeds before serving. Store leftovers in an airtight container for up to 3 days.

Tried this recipe?

Let us know how it was!