Combine shrimp, ginger, and crushed red pepper in a small bowl; let stand 5 minutes.
Heat oil in a large nonstick skillet over high heat. Add bell pepper, green onions, and garlic; stir-fry 1 to 2 minutes or until tender. Add shrimp mixture to pan; stir-fry 4 to 5 minutes or until shrimp are done. Add riced cauliflower; stir-fry 2 minutes or until thoroughly heated. Push rice mixture to sides of pan, forming a well in center. Add egg to center of pan, and cook 30 seconds; toss with rice mixture, and stir-fry until egg is cooked. Stir in liquid aminos and water; cook until thoroughly heated.