Gruyere and Ham Mac and Cheese Pot Pies

INGREDIENTS

1 lb

elbow pasta

1 stick

unsalted butter

1/2 cup

all purpose flour

1/2 tsp

kosher salt

1/2 tsp

freshly ground black pepper

3 cups

half and half or whole milk

3 cups

shredded gruyere cheese, plus 1 1/2 cups for topping

3 cups

diced cooked ham

sheets puff pastry, room temperature (2 boxes)