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["In a small bowl soften yeast in 1/4 cup of the lukewarm milk with the sugar. Let it stand a few minutes, stir to dissolve completely; set it aside for 5-8 minutes till it's foamy.", "Pour flour into a deep mixing bowl & make a well in it. Pour the yeast mix & remaining flour into the well and mix well, beating vigorously till a stiff dough forms.", "Remove dough to lightly floured board and knead about 10 minutes till dough is smooth & elastic.", "Place in buttered bowl, cover with towel & allow to rise about 45 minutes or until dough doubles in bulk.", "The Filling.", "Combine beef, onions, salt & pepper and mix well.", "Assembly:.", "On lightly floured board roll out dough to 1/8"" thickness & cut out 16 circles with a 4-1/2 inch cookie cutter.", "Place 5 teaspoons of filling on each circle & moisten the edges with cold water.", "Fold up all edges of the dough, enclosing the filling & making a flat, round cake.", "Heat oven to 250 degrees.", "In a 10 to 12 inch heavy skillet set over high heat melt 3 tablespoons butter in 2 tablespoons oil till hazy;.", "Add half of the flat cakes & cover the pan.", "Reduce heat to moderate and cook cakes about 10 minutes on each side and are crisp & brown.", "Transfer to ovenproof platter and keep warm while you cook the other half of the cakes, adding remaining butter & oil to pan if needed.", "Serve at once."]