Combine dough ingredients and knead to form smooth dough. Add more flour if necessary. Refrigerate for 1 hour.

Saute onions in oil until soft. Add mushrooms and saute for 10 minutes.

Combine remaining ingredients and add to mushrooms. Bring to a boil and remove from heat. Cool.

Roll out dough and cut into 2 and 1/2-inch by 2 and 1/2-inch squares.

Place 1 tablespoon of filling mixture onto each square. Fold dough over and press edges with tines of fork.

Place turnovers on cookie sheets. Brush with beaten egg and sprinkle with sesame seeds.

Bake at 350 degrees Fahrenheit for 20-25 minutes or until golden.