Slice the cooked parsnips lengthwise into 1/3" strips.
Arrange one layer of parsnips in a greased baking dish.
Sprinkle with cheese& breadcrumbs, alternate parsnips with the cheese and crumbs, distribute evenly until the parsnips are all in the baking dish (usually 2-3 layers depending on the size of the parsnip).
Pour inenough milk (cream) until it reaches half the depth of the parsnips.
Cut bacon in tiny cubes and sprinkle on top.
Thirty minutes before dinner pop the casserole into a 400 degree F oven.
The Dish is ready when the bacon bits are crisp and the dish is bubbling.