Spiralized Winter Veggie Gratin

INGREDIENTS

Olive oil spray

medium (7 ounce) sweet potato, peeled and spiralized

1 lb

carrots, 1.5″ in diameter, peeled and spiralized

1 1/2 lb

whole butternut squash, peeled and spiralized

medium (7 ounces total) parsnips, peeled and spiralized

1 1/2 tbsp

olive oil

4 tsp

fresh chopped thyme

1 tbsp

fresh chopped oregano

3 tbsp

fresh chopped Italian parsley

1 1/4 tsp

Kosher salt

Freshly ground black pepper,

1/2 tbsp

butter

1/3 cup

chopped shallots

3 tsp

all-purpose flour (or gluten free flour for GF)

1 cup

fat free milk

1 tbsp

grated parmesan cheese

2 1/2 oz

grated Gruyere cheese, divided