In a blender or food processor, place raspberries, nectarine slices, brandy & honey. Cover & process about 1 minute, until smooth.
In a large plastic bag, place flour, salt & pepper. Slice tenderloin into 1/4-1/2″ medallions & place in bag. Shake to coat pieces evenly. In a large skillet, heat oil; saute pork medallions about 4 minutes or until no longer pink.
Heat sauce & spoon some on a serving plate. Place pork medallions on sauce; drizzle with additional sauce. Garnish with additional fresh raspberries if desired.