Instructions: Have the lamb cut into medallions, although chef Jack Huxtable notes that the sauce he created for these medallions also works well with any red meat steaks, roasts, or chops. Ask your butcher to prepare medallions for you.

Place onions in a saucepan and "sweat" them by cooking slowly over medium-low heat, without browning. Add wine and vinegar, increase heat, and reduce the liquid by three-fourths. Add chicken stock and reduce by three-fourths. Add cream and reduce until sauce is thick. Do not boil. Add horseradish and seasonings. Strain. Sauce can be made in advance and reheated.

Heat oil in saute pan and saute lamb until medium-rare. Transfer to serving dishes. Wipe pan and melt butter. Saute cucumber for one minute. Add tomato. Remove from heat.

To serve ladle the warm sauce around lamb. Scatter the cucumber and tomato on top of the sauce.

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