Pat shrimp dry: Use paper towels to remove excess moisture. Season lightly with salt and pepper.
Dry shrimp sear better and won’t steam in the pan.
Mix the sauce: In a small bowl, whisk coconut aminos or tamari, keto syrup, erythritol or allulose (if using), vinegar, sesame oil, red pepper flakes, and ginger. Taste and adjust sweetness or salt.
Pre-thicken if desired: If you like a glossy, clingy sauce, sprinkle the xanthan gum very lightly over the sauce while whisking. Start with a tiny pinch; it thickens fast.
Heat the pan: Set a large skillet over medium-high heat.
Add avocado oil and let it shimmer.
Sear the shrimp: Add shrimp in a single layer. Cook 1–2 minutes per side, until pink and just opaque. Do this in batches if needed to avoid crowding.
Transfer cooked shrimp to a plate.
Sauté the garlic: Lower heat to medium. Add minced garlic to the pan with a splash of oil if dry. Cook 20–30 seconds until fragrant, not browned.
Glaze it up: Pour in the sauce.
Simmer 30–60 seconds, stirring, until slightly thick and glossy. If you skipped xanthan gum, reduce 1–2 minutes to concentrate.
Coat the shrimp: Return shrimp and any juices to the pan. Toss to coat for 30–60 seconds, just to warm through.
Do not overcook.
Finish and serve: Sprinkle sesame seeds and green onions. Add a squeeze of lime if you like brightness. Serve over cauliflower rice, zoodles, or stir-fried cabbage.