Spinach Macaroni and Cheese

INGREDIENTS

3 tbsp

unsalted butter

1/2 cup

finely minced sweet onion

1/3 cup

all-purpose flour

2 cups

whole milk

2 cups

2% milk

kosher salt & freshly ground black pepper,

4 cups

spinach leaves (4.5 ounces), cut into 1/2-inch strips

1 cup

shredded Sharp White Cheddar Cheese

2/3 cup

shredded Smoked Gouda

1/3 cup

crumbled goat cheese

3/4 lb

elbow macaroni , cooked according to package instructions