Trim fat from tenderloin; cut tenderloin into 1/2-inch-thick slices.
Combine flour and salt in a heavy-duty, zip-top plastic bag. Seal bag; shake well.
Add tenderloin. Seal bag; shake until well coated.
Melt margarine in a nonstick skillet over medium heat.
Add tenderloin; cook until browned, turning once.
Remove from skillet.
Add wine, bouillon granules, and pepper to skillet; bring to a boil. Reduce heat, and simmer, uncovered, 2 minutes. Return tenderloin to skillet; cover and simmer 2 minutes or until sauce is thickened.