Cheesy Instant Pot Au-Gratin Potatoes

INGREDIENTS

large russet potatoes, peeled, and sliced thin

2 cups

milk (full fat) or, half & half

3 tbsp

butter (not margarine)

1/4 cup

all purpose, unbleached & unenriched flour

1 cup

+ 1/4 C. grated cheddar cheese, separated

salt/pepper,

Optional: 1 C. diced ham