Ingredients
Method
- Preheat oven to 350° convection or 375° conventional.
- Scrub, peel, and slice potatoes about ⅜ inch thick.
- Chop onion and slice turkey ham into bite-size pieces.
- Melt butter in a saucepan over medium-high heat, add onion, and cook until clearing (3–4 minutes).
- Sprinkle in flour and cook, whisking, for about 2 minutes until light browning.
- Slowly add milk while whisking. Cook until thickening well (3–4 minutes). Mix in salt and pepper.
- Prep a 9 by 13 inch casserole dish with butter.
- Layer potatoes, ham, cheese, and sauce, repeating twice. Add extra cheese to the top layer.
- Cover with aluminum foil.
- Bake 45–90 minutes covered, then 20–25 minutes uncovered until golden and bubbling. Let sit for 10 minutes before serving.
Notes
For a richer flavor, use heavy cream instead of milk.
