Celery Root Hash

Name: Celery Root Hash
Ingredients: 1 large celery root (celeriac), peeled, cut into 3/4-inch pieces; 1 pound sweet potatoes, peeled, cut into 3/4-inch pieces; 2 sprigs thyme; 1 bay leaf; 1 cup low-sodium chicken broth; 3 tablespoons olive oil; 1/4 teaspoon cayenne pepper; 1 red onion, sliced; 1 garlic clove, thinly sliced; Kosher salt, freshly ground pepper; 5 slices bacon, cooked, crumbled; Chopped fresh chives (for serving)