Scalloped Potatoes

(makes a 9x12 pan and a 9x9 pan together)

about 10-15 potatoes, depending on size (peeled, and sliced)
1 large onion, chopped
shredded cheese (colby jack, or cheddar)

3 tsp salt
8 eggs, beaten
4 C milk
4 tsp dried parsley
2 tsp black pepper
4 tsp paprika
2 tsp dry mustard powder (important ingredient)
parmesan cheese (to thicken it, not sure how much)
butter to melt in pans

-slice potatoes and mix with diced onion.
-melt butter in pans.
-layer potatoes, then cheese, potatoes, cheese, etc… in pans.
-mix rest of ingredients well, and carefully pour over potatoes.
-bake 375 degrees for about an hour, covered, until potatoes are soft.