In a bowl, stir together 4 tbsp water, 2 tbsp ketchup, 1 tbsp soy sauce, 2 tsps cornstarch, 1 tsp honey, 1/2 tsp crushed red pepper, and 1/4 tsp ground ginger. Set aside. Heat 1 tbsp vegetable oil in a large skillet over medium-high heat. Stir in 1/4 c. sliced green onions and 4 cloves minced garlic; cook 30 seconds. Stir in 3/4 lb peeled and deveined shrimp, and toss to coat with oil. Stir in sauce. Cook and stir until sauce is bubbly and thickened. Serve over rice.