In A Skillet Over Low Heat, Melt Cream Cheese And Butter; Stir Until Smooth. Add Milk, Garlic Powder, Salt And Pepper. Cook And Stir For 3 Minutes Or Until Thickened. Add Chicken, Broccoli, Zucchini And Red Pepper. Cook Over Medium Heat For 3 Minutes. Reduce Heat; Cover And Cook 5 Minutes Longer Or Until Vegetables Are Tender. Serve Over Fettuccine.