Pat shrimp dry with paper towels and toss with cornstarch, salt, and pepper. This dries the exterior completely, ensuring perfect searing. Set aside while prepping vegetables.
Combine soy sauce, sesame oil, ginger, red pepper flakes, chicken broth, and lime juice in a small bowl. Whisk until smooth and set your sauce aside for later use.
Heat 1.5 tbsp vegetable oil in a large skillet or wok over high heat for 2 minutes until smoking hot. Add shrimp in a single layer and cook 2-3 minutes per side without stirring, then transfer to a plate.
Add remaining 1.5 tbsp oil to the same skillet and immediately add garlic, onion, and broccoli. Cook for 3 minutes, stirring constantly, then add bell pepper and snap peas. This 30 minute shrimp stir fry family summer recipe depends on proper vegetable timing for crunch.
Return shrimp to the skillet with all vegetables, then pour sauce over everything. Toss constantly for 2 minutes until sauce thickens and coats all ingredients evenly.
Garnish with green onions and serve immediately over steamed rice. The quick stir fry components finish cooking within seconds once sauce hits the hot pan.