Combine broth, vinegar, soy sauce, cornstarch, sugar, and sesame oil in cup; set aside.
Heat wok or large skillet over high heat until drop of water sizzles. Swirl in peanut oil. Add garlic, ginger, and red pepper flakes and stir-fry 10 seconds.
Add shrimp and cook, undisturbed, 1 minute, letting shrimp begin to sear. Stir-fry 30seconds, until shrimp are lightly browned but not cooked through.
Add snap peas and salt. Stir-fry 30 seconds or just until combined. Add bell pepper and scallions. Stir broth mixture and add to wok. Stir-fry 1–2 minutes or until shrimp are just cooked and vegetables are crisp-tender.
Serve hot
Notes
This recipe is 4 Green and 3 Blue or Purple WW Points.