Adapted from syrupandbiscuits.com
medium sweet onion
tablespoon cooking oil
ounces cream cheese, room temperature
cup half and half
(10 ounce) packages frozen chopped spinach, squeeze to remove as much water as possible.
teaspoon cayenne pepper
teaspoon nutmeg, fresh grated
teaspoon kosher salt
cup shredded sharp cheddar cheese , divided
cup shredded Asiago cheese, divided
Sauté onion in oil until tender. Set aside to cool. Mix half and half and cream cheese with a mixer until creamy. Add spinach, cayenne pepper, nutmeg, kosher salt, 1/2 cup sharp cheddar cheese, 1/2 cup Asiago cheese and sautéed onions. Mix well. Pour into a 9 inch buttered casserole dish. Mix together remaining cheese and spread over casserole. Bake at 350 degrees for 45 minutes or until casserole is bubbling and top browns.