Scalloped Yam Stacks

1 ½-2 lbs. small yams, peeled and thinly sliced1 T. chopped fresh thyme, divided1 c. freshly shredded mozzarella cheese, divided2/3 c. heavy cream1 T. minced garlicSalt and fresh black pepper, to taste1. Preheat oven 375. 2. Layer half of yams…