Preheat oven to 450 degrees.
On a large sheet pan, combine shrimp, snow peas, carrots, and bell peppers with vegetable oil, garlic, ginger, a 1/4 teaspoon of kosher salt and several turns of freshly ground black pepper.
Roast for about 6 minutes on upper rack of oven then turn broiler to high and continue cooking until shrimp have cooked through and vegetables pick up a little color.
IMPORTANT: Cooking time will vary based on shrimp size. Watch closely to avoid overcooking.
While shrimp and vegetables are cooking, prepare stir-fry sauce,
In a small sauce pan, stir together water, soy sauce, corn starch, sugar, and crushed red pepper,
Bring sauce to a boil and let simmer until thick and smooth.
Turn off heat and stir in orange juice.
Remove shrimp and vegetables from oven, drizzle with 1/2 of sauce.
Sprinkle with sesame seeds and green onion.
Serve with steamed rice or cauliflower rice and remaining sauce.