Preheat oven to 375°.
Trim fat from tenderloin. Combine soy sauce and next 3 ingredients, stirring well. Spread soy sauce mixture over tenderloin.
Place tenderloin on a rack in a roasting pan coated with cooking spray. Insert meat thermometer into thickest part of tenderloin, if desired. Bake, uncovered, at 375° for 30 minutes. Brush tenderloin with apricot spread. Bake 10 additional minutes or until meat thermometer registers 160°, basting often with apricot spread. Let stand 10 minutes before slicing.
Tip: Even though peanut butter is a high-fat food, the type of fat it contains is monounsaturated--a heart-healthy kind of fat.