Sweet Potato Casserole with Marshmallows and Streusel

INGREDIENTS

3 lb

sweet potatoes* (peeled and chopped into large chunks, see note)

2 tbsp

unsalted butter

1/4 cup

milk or half and half

1/2 tsp

ground cinnamon or pumpkin pie spice

2 tbsp

brown sugar

salt (to taste)

4 tbsp

unsalted butter (softened)

1/4 cup

brown sugar

1/4 cup

all purpose flour

1/2 tsp

ground cinnamon

1/8 tsp

salt

1/2 cup

chopped pecans

2 cups

mini marshmallows (or more, if you'd like)