In large skillet, melt 1 Tbsp. margarine over medium-high heat. Add chicken; cook and stir 4 to 5 minutes or until browned. Sprinkle with black pepper.
2
Stir in 1¼ cups water, ½ cup milk and 2 Tbsp. margarine. Bring to a boil. Stir in pasta, seasonings and green beans. Return to a boil. Reduce heat to medium-low. Gently boil uncovered 5 to 6 minutes, or until pasta is slightly firm, stirring frequently.
3
Remove skillet from heat. (Sauce will be thin.) Let stand 3 to 5 minutes for sauce to thicken. Sprinkle with onions.