Marinate the Steak and Shrimp by mixing soy sauce with cornstarch until smooth, then coat the steak and shrimp and let them marinate for 15-20 minutes.

Heat the Skillet by adding 1 tablespoon of vegetable oil to a hot skillet or wok over high heat.

Cook the Steak in the hot skillet for 2-3 minutes until browned and cooked through, then remove and set aside.

Cook the Shrimp in the same skillet for another 2-3 minutes, until pink and opaque, then remove and set aside with the steak.

Sauté the Vegetables by adding bell peppers, broccoli, and carrot to the skillet, cooking for 3-4 minutes until tender-crisp, then add garlic and ginger for one more minute.

Combine and Serve by returning the steak and shrimp to the skillet with the vegetables, tossing together for 1 minute, and seasoning with salt and pepper.