Heat the vegetable oil in a large sauté pan over medium high heat. Add the asparagus and tomatoes and cook, stirring occasionally for 5 minutes. Add the shrimp and cook for 2 minutes, flipping halfway until nearly cooked through. Add the soy sauce mixture and cook, stirring often, for 1-2 minutes.Sprinkle with chopped green onions. Serve immediately with rice if desired. Enjoy.