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Export 8 ingredients for grocery delivery
Step 1
Preheat oven to 350°F/180°C.
Step 2
Pour potato slices in casserole dish.
Step 3
In small bowl, combine powdered milk, flour, cornstarch, onion, chives, salt, mustard powder and black pepper. Stir well.
Step 4
Gradually whisk in water and mix to ensure no lumps remain.
Step 5
Pour over potato slices.
Step 6
Cut butter in small pieces and distribute over top of potatoes and liquid.
Step 7
Place in oven and cook for 40 to 45 minutes.
Step 8
Remove from oven and let rest and set for 5-10 minutes before serving.