PREPARATION:
- Whisk together water, soy sauce, hoisin sauce and cornstarch in small bowl; set aside.
- Heat peanut oil in large skillet or wok over medium-high heat. Add beef; cook and stir 5 to 6 minutes or until still slightly pink Remove beef to plate with slotted spoon.
- Add sesame oil, mushrooms and baby corn to skillet; cook and stir 2 to 3 minutes or until mushrooms are tender and corn is heated through. Add asparagus, snap peas and bell peppers; cook and stir 1 minute or until crisp-tender.
- Return beef with any juices to skillet. Stir in reserved soy sauce mixture and tomatoes, if desired. Cook 1 minute or until heated through and liquid has thickened, stirring occasionally.
