Heat 1 tablespoon oil in large skillet over high heat; stir-fry pork for 3-5 minutes or until no longer pink. Remove pork from skillet with slotted spoon; cover to keep warm.
Add beans to skillet; stir-fry for 1 minute. Push beans to side of skillet; add 1 tablespoon oil to center of skillet. Add onion and mushrooms; stir-fry all vegetables for 2 minutes. Remove from skillet; cover to keep warm.
Stir together tomatoes, cornstarch, sugar, salt and basil. Add to skillet; bring to boil. Add polenta. Cook, stirring gently, over high heat for 1 minute. Return all to skillet; cook, stirring gently, for 1 minute. Transfer to shallow pasta serving bowl; sprinkle with cheese. Serve immediately with a side of garlic bread.