1/2 c  Chopped onion
1/4 c  Butter
1 cn (8 oz) well drained
Sauerkraut
1/2 c  Grey poupon
1 ts Caraway seed
8    Sheets phyllo dough
1/2 lb Thinly sliced corned beef
1/4 lb Sliced swiss cheese
3/4 c  Sour cream

In saucepan, over medium heat, cook onion in 1 Tbls. butter until
tender. Stir in kraut, 1/4 cup mustard & caraway seed. Melt remaining
butter. Stack phyllo sheets, brushing with melted butter in between
each layer. Top with layers of corned beef, cheese & kraut mixture to
within 1″ of edges. Roll up from long edge, jelly roll style, tucking
in ends & brushing seams with butter. Place roll. seam side down on
greased baking sheet. Cut slits on top of roll in 12 even sections,
about 1/2″ deep. Bake at 375 for 30-35 minutes or until golden brown.
To make sauce, blend remaining mustasrd & the sour cream. Slice roll
& serve with sauce.