Cook fettuccine according to package directions, drain, reserving 1/4 cup pasta water.
Combine 1 teaspoon Knorr® Chicken flavor Bouillon with 1 tablespoon olive oil. Toss chicken pieces in mixture.
Heat 12-inch skillet over medium-high heat and cook chicken, stirring occasionally, until chicken is thoroughly cooked. Remove chicken and set aside.
Add remaining 1 tablespoon olive oil to same skillet, stir in onion and cook, stirring occasionally, 4 minutes or until golden. Add garlic and cook 30 seconds. Stir in crema, remaining 1 tablespoon Knorr® Chicken flavor Bouillon, reserved 1/4 cup pasta water, Parmesan cheese and bring to a simmer. Stir in chicken and cook until heated through. To serve, toss hot fettuccine with sauce and chopped basil in large bowl.