I tried this one out and it is great!

Combine

3/4 cup fresh sourdough starter
1/4 cup warm water
Two eggs
3/4 cup sugar (granulated or brown)
1/4 teaspoon salt
1/2 stick butter or margarine, melted and slightly cooled

Stir in gradually 2 to 3 cups flour, or enough to form a slightly stiff dough. Knead until smooth.

Let stand, covered, until double.

Roll out into a large rectangle, about 18" by 15". Melt 2 to 4 tablespoons butter, spread over the dough. Combine 1/2 to 1 cup brown sugar, 1 table-spoon ground cinnamon (1/4 to 1/2 teaspoon ground coriander or other spice). Sprinkle evenly over the dough. (Sprinkle 3/4 cup chopped nuts and/or raisins over the dough). Roll up tightly, starting at a long side. Seal the edge. Slice evenly into twelve slices.

Place, cut side down, in a large greased baking pan. Let rise.

Bake 20 to 25 minutes at 400. Cool on a rack. Drizzle with icing made from 1/2 cup confectioner's sugar, 1/4 teaspoon vanilla (or lemon juice), 1 tablespoon milk, enough additional confectioner's sugar to make the right consistency.