I found this recipe in the cooking community, posted by everyfishy. Re-posted here to keep, with her permission.
For me, comfort food is something i crave at the end of a long, usually cold day when I say 'to heck with healthy" and dive for the cream and cheese. Kraft Macaroni and Cheese (yeah, the gross orange stuff) is a favorite, but so is this sinfully good casserole, best made ahead of time:
Oven Cheese Fondue
10 slices good quality crusty bread
1 c. dry Riesling
2 c. cream
2 T. minced parsley
1 t. dry mustard
2 c. gruyere, grated
1 t. salt
3 T. onion, minced
Heat oven to 325. cut bread into cubes. Beat together eggs, wine, cream, and seasonings. Stir in bread, cheese, onion, and meat. Pour into ungreased 11 1/2 x 7 1/2 x 1 1/2 baking dish. Bake, uncovered, one hour. this is best if it sits overnight or at least all day, covered in the fridge. If you do this, don't use a glass pan as it will break going form the cold fridge to a hot oven.
When questioned about the meat, she answered that she seldom adds meat, but that her mom used diced chicken or ham sometimes. From the look of the recipe, I'd add one to two cups of meat if desired.