Cook farfalle pasta in lightly salted water according to package directions, reserving 1 cup cooking water before draining.
Meanwhile, melt 1 Tbsp. margarine in deep 12-in. nonstick skillet over medium-high heat and cook 1/2 of the chicken, stirring occasionally, until almost cooked, about 4 minutes. Remove chicken from skillet and set aside. Repeat with additional 1 Tbsp. Spread and chicken.
Melt remaining 2 Tbsp. margarine in same skillet and cook vegetables, stirring frequently, until vegetable are tender, about 8 minutes. Stir in garlic and cook 30 seconds. Stir in pasta water and Knorr® Homestyle Stock - Chicken and simmer just until Stock is melted. Stir in chicken, pasta and cheese and simmer 2 minutes or until chicken is thoroughly cooked. Serve over hot farfalle pasta, then sprinkle basil.