1Cook and drain pasta as directed on package. Heat vegetable oil in 10-inch skillet over medium-high heat. Cook pork, onion, gingerroot and garlic in oil, stirring occasionally, until pork is no longer pink; reduce heat to low.
2Stir in peanut butter, chili sauce, sesame oil, salt and red pepper. Gradually stir in water, stirring constantly, until peanut butter is melted. Heat to boiling; reduce heat to low. Simmer uncovered about 5 minutes, stirring frequently, until sauce is slightly thickened. Add pasta, green onions and tomatoes; toss until well coated.