3lbssweet potatoes- peeled and thinly sliced into ⅛” rounds
2medium red onions, thinly sliced
½tablespoonroughly chopped fresh rosemary leaves
8ozsmoked gouda cheese, grated
8ozgrated asiago cheese
1teaspoonsmoked paprika
¼teaspoonground sage
2teaspoongarlic powder
¼teaspoonsalt
¼teaspoonfresh ground black pepper
½cupheavy cream
4tablespoonmelted butter
1cupsour cream
2cupsmilk
¼cupcornstarch
Instructions
Preheat oven 375 degrees. 2. Spray a large ceramic baking dish (about 10” x 14”, ie: a lasagna pan) liberally with cooking spray. 3. In a large mixing bowl, stir together chopped rosemary, grated smoked gouda, grated asiago, smoked paprika, ground sage, garlic powder, salt, and pepper. Set aside. 4. Add a single layer of potatoes to the greased baking dish. 5. Next, add a single layer of onion slices. 6. Following the onions, layer on half of the cheese mixture, evenly. 7. Add another layer of potatoes, followed by another layer of onions, and a final layer of potatoes. 8. In a large mixing bowl, whisk together milk, sour cream, melted butter, heavy cream and cornstarch until well combined and cornstarch is fully incorporated and completely dissolved. 9. Pour over mixture over the potatoes. 10. Layer on remaining reserved half of cheese mixture over the top. 11. Bake uncovered on middle rack of oven for 1 hour and 15 minutes to 1 hour and a half, until cheese is well browned, and potatoes are easily pierced with a fork. 12. Allow to cool at least 15 minutes before serving to allow it to set (and be cool sought to eat!)