Potato, Cauliflower, and Cheddar Bake

INGREDIENTS

1 tbsp

unsalted butter, plus more for dish

1 1/2 lb

Yukon Gold potatoes (about 6 medium), peeled and sliced 1/2 inch thick

Salt and pepper

small head cauliflower (about 2 pounds), sliced 1/2 inch thick

1 tbsp

fresh thyme leaves

1 1/2 cups

shredded sharp cheddar (6 ounces)

1/3 cup

chicken broth