Grease casserole.  Fill with apples.  Add water and sprinkle with cinnamon.  Make fine crumb mixture of sugar, flour, salt, and butter.  Spread evenly over apples.  Pat firmly. 

Bake about 35 minutes at 375 degrees.

Makes 4 to 6 servings.

Note:  For a vegan version, substitute soy margarine for the butter.

This is delicious with vanilla ice cream or whipped cream, but not if you're vegan...