1Prepare fettuccine according to package directions and keep warm. Sprinkle chicken with salt and pepper.
In a large skillet, heat olive oil over medium heat. Add chicken, and cook for 2 to 3 minutes per side, or until golden brown. Remove from skillet, and cut into ½-inch pieces.
Add onion and bell pepper to skillet, and cook, over medium heat, for 3 to 4 minutes, or just until tender. Add squash and zucchini, and cook for 3 to 4 minutes, or just until tender. Stir in cream and pesto, and cook for 5 minutes, or until slightly thickened. Add pasta and chicken, tossing gently to coat. Serve immediately.