Prepare the Ingredients: Slice the sirloin steak into thin strips and chop the bell pepper, zucchini, and broccoli into bite-sized pieces. Devein shrimp if necessary, taking about 10 minutes.

Heat the Oil: In a large skillet or wok, heat 2 tablespoons of olive oil over medium-high heat until shimmering, roughly 2 minutes.

Cook the Steak: Add the sliced sirloin steak to the skillet and sear for 3-4 minutes until browned and cooked through. Remove and keep warm.

Sauté the Shrimp: Add another tablespoon of olive oil if needed and cook shrimp for 2-3 minutes until pink and opaque. Set aside.

Stir-Fry the Vegetables: Add minced garlic and ginger, sauté for 30 seconds, then add bell pepper, broccoli, and zucchini. Stir-fry for 5-7 minutes.

Combine Everything: Return steak and shrimp to the skillet, add soy sauce and sesame oil, and stir for 1-2 minutes.

Adjust the Seasoning: Taste and add more soy sauce, salt, or pepper as needed.

Serve and Garnish: Remove from heat, serve hot, and garnish with sesame seeds and green onions.