Bison Cheddar Cauliflower Steaks

Name: Bison Cheddar Cauliflower Steaks
Ingredients: 1 large head cauliflower (cut into thick slices (about 1 inch wide)); salt and pepper to taste; 1 teaspoon fresh thyme; 1 tablespoon extra virgin olive oil; 1/2 cup Sargento sharp cheddar fine cut; 1/2 pound ground bison; 1/2 tablespoon butter; 1/2 tablespoon extra virgin olive oil; 1 large shallot (thinly sliced); 1 leek (washed well, sliced lengthwise then thinly sliced into half rings); 3/4 pound crimini mushrooms (cleaned and left whole); 1/4 cup whole milk; 1/2 teaspoon cinnamon; 1/4 teaspoon nutmeg