Directions

1. Preheat an oven to 350°F.
2. In a large skillet, melt 2 tbsp butter, then add the sliced onion and cook over low heat, stirring frequently, until soft and lightly caramelized. About 30 minutes.
3. In a medium saucepan, combine cream, garlic, salt, and pepper, and bring to a low simmer 5 minutes, then set aside.
4. Spread the remaining 1 tbsp Butter into a 3-quart (9X13) baking pan. In the buttered pan, place 1/4 of the sliced potatoes, 1/3 of the caramelized onions, 1/3 of the crab, 1/3 of the diced brie, 1/4 of the parmesan, and 1 tsp chopped thyme. Repeat this layering process ending with a final layer of potatoes and top with the remaining parmesan.
5. Pour the reserved cream mixture over the potatoes, making sure to cover it evenly.
6. Cover Pan with buttered parchment paper, and then a layer of foil. Bake for 30 minutes. Remove Foil and parchment then bake an additional 15- 20 minutes. Or until the sauce is bubbly, the cheese on top is nicely browned, and the potatoes are tender.
7. Let rest for 10 minutes to set before serving.