Simmer Ham With Onions And Leek For 1 Hour In A Roasting Pan With All But 1/2 Of The Wine. In A Skillet, Brown Mushrooms In Butter. Make A Slash In The Ham Large Enough To Hold Mushroom Mixture, Water, Salt And Pepper. Skewer The Opening To Keep In Place. Make A Sauce Remaining The Remaining Butter, Flour And Some Of Liquid From The Roaster. Add The 1/2 Cup Of Wine And Mix Well. Pour Over The Ham In Roasting Pan Then Bake At 375* For 2 Hours.