Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat.
Add the sliced beef sirloin to the hot skillet. Season with salt, pepper, and smoked paprika. Stir fry until browned, about 3-4 minutes. Remove the beef from the skillet and set aside.
In the same skillet, add the remaining tablespoon of oil. Toss in the sliced onion and cook for 1-2 minutes until softened.
Add the minced garlic and sliced bell pepper, stir-frying for another 2 minutes.
Incorporate the snap peas, corn, and julienned carrots into the mix, cooking for an additional 3-4 minutes or until the vegetables are tender-crisp.
Return the beef to the skillet. Add the soy sauce and Worcestershire sauce, stirring until everything is well coated and heated through.
Cook for another minute, allowing the flavors to meld together. Adjust seasoning with more salt and pepper if necessary.
Remove from heat and garnish with fresh cilantro before serving.
Notes
Feel free to substitute vegetables based on preference.