Finely chop green onions, separating white part from green part. In 10-inch nonstick skillet, cook pork over medium-high heat 4 to 5 minutes, stirring occasionally, until no longer pink; drain. Stir in shrimp, white parts of green onions, 1 tablespoon of the oyster sauce, the salt and pepper. Cook 1 to 2 minutes or until shrimp turn pink. Remove from heat.