1-Start by letting the sirloin steak rest at room temperature while you get the vegetables ready. Wash and cut the broccoli into florets, then steam them for about 3 minutes until they soften a bit. Quarter the mushrooms, peel and thinly slice the carrots to about 1/8 inch thick, cut the zucchini into 3-inch long strips that are 1/4 inch thick, and chop the onion into 1-inch pieces. Pound the chicken breast to make it an even thickness for cooking.

2-Next, heat a cast iron or grill pan over medium-high to high heat and add 1 tablespoon of olive oil. Season the steak with salt and pepper, then sear it for 3 minutes on each side. Let the steak rest for 10 minutes before cutting it into 1-inch cubes. Season the chicken lightly with salt and pepper, cook it for 3-5 minutes on each side, remove it from the heat, and cut it into 1-inch cubes.

3-Return the chicken to the pan, add 1 tablespoon soy sauce and sprinkle with sesame seeds to finish cooking. In a large skillet, heat another 1 tablespoon olive oil and cook the onion, garlic, and ginger for 1-2 minutes. Add the carrots and cook for another 1-2 minutes, then add the mushrooms, zucchini, and broccoli in stages until the vegetables are tender. If the pan gets too full, use two skillets to avoid overcrowding.

4-Adding the Final Touches: Once the vegetables are ready, mix in 2 tablespoons soy sauce and season with pepper to taste. For the sauce, combine 1/4 cup soy sauce, 2 tablespoons white vinegar, 2 tablespoons minced onion, 1 teaspoon minced ginger, and 1 teaspoon lemon juice in a separate bowl and set it aside for serving. This step ensures the flavors meld well. The whole process takes just 10 minutes of prep and 25 minutes of cooking, making it ideal for food enthusiasts or newlyweds.