In a large bowl, dissolve yeast and sugar in warm water; let stand for 5 minutes. Add the salt, milk powder and 1-1/2 cups flour; mix well. Stir in enough remaining flour to form a soft dough. Do not knead.
Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 1 hour.
Punch dough down. Press into a greased 15x10x1-in. baking pan. Combine the eggs, cheese, chives and garlic salt; pour over crust. Bake at 350° for 20-25 minutes or until golden brown. Cut into squares.