By Stefano Rebaudo (Reuters) – Euro zone bond yields fell sharply on Monday while long-term inflation expectations dropped below 2% as recession fears deepened after warnings about a possible cut in Russian gas supplies. French Finance Minister Bruno Le Maire said on Sunday the French government was preparing for a total cut-off of Russian gas supplies. Germany has moved to stage two of a three-tier emergency gas plan, warning of recession if Russian gas flows are halted. The five-year, five-year forward inflation swap, hit its lowest since March 2 at 1.9898%, below the 2% target of the Europe…