Combine first 3 ingredients; stir well. Set soy sauce mixture aside.
Heat 2 teaspoons oil in a large nonstick skillet over medium-high heat. Add shrimp, and stir-fry 30 seconds. Add peas, onions, and water chestnuts, and stir-fry 2 minutes. Add soy sauce mixture, and stir well. Remove shrimp mixture from skillet; set aside.
Heat 1 teaspoon oil in skillet over medium-high heat. Add chilled rice, and stir-fry 2 minutes. Return shrimp mixture to skillet; stir-fry 1 minute or until mixture is thoroughly heated. Sprinkle shrimp mixture with sliced almonds and chopped parsley.