Wash mushrooms and trim tough bottoms from stems. Mince mushrooms very fine with knife. Sauté them in a chunk of butter for about 2 minutes, then season with salt, pepper, and a bit of sugar. Remove from heat.
Melt piece of butter in oval skillet or pan. Add wine. Lay in 2 fillets. Cover with mushrooms. Top with remaining 2 fillets. Cut foil to fit pan. Coat