Summer Kohlrabi

1 c. finely chopped onions 1 lb. peeled kohlrabi, cut into stick pieces about 1 1/4 inches long and 1/4 inch thick 4 tbsp. butter 1/2 tsp. salt About 1/4 tsp. black pepper 1 tbsp. flour 1 c. milk 1/3 c. finely chopped fresh parsley In a heavy frying pan over medium...