Mushroom and Brussels Sprouts Pizza

Name: Mushroom and Brussels Sprouts Pizza
Cook time: 25 min
Total time: 25 min
Cuisine: European, Italian, Mediterranean
Ingredients: Cornmeal, for baking sheet; Flour, for surface; 1 lb. refrigerated (or thawed from frozen) pizza dough; 3 oz. fontina cheese, coarsely grated, divided; 4 oz. shiitake mushrooms, stems discarded, torn; 1 1/2 tbsp. balsamic vinegar; 4 large Brussels sprouts, trimmed, loose leaves separated, remaining thinly sliced; 1 small red onion, sliced; 2 tbsp. olive oil; Kosher salt and pepper; 2 oz. fresh goat cheese; 6 sprigs fresh thyme