Fifteen minutes, one pan, and you've got a high protein dinner that beats any takeout. The trick is high heat and not overcooking the shrimp — keep them snappy.
In a small bowl, whisk together soy sauce, cornstarch, and 2 tbsp water to make a slurry; set aside.
Heat a large skillet or wok over high heat. Add vegetable oil and let it shimmer before adding the shrimp in a single layer. Sear for about 1–2 minutes per side until shrimp just turns pink, then immediately remove to a plate.
Add sesame oil to the pan, reduce the heat slightly, and add broccoli, carrots, and bell pepper. Stir-fry on medium-high for 3–4 minutes until vegetables are bright and just tender.
Add garlic and ginger to the pan, stir constantly for 30 seconds, being careful not to burn them.
Return the shrimp to the pan with the vegetables. Give the sauce a quick stir and pour over everything. Stir-fry for an additional 1–2 minutes to coat, until the sauce thickens and shrimp are just cooked. Add scallions and black pepper, toss, and serve immediately.