Vegetable Risotto Dressing

Name: Vegetable Risotto Dressing
Ingredients: 2 tablespoons extra-virgin olive oil; 1/2 pound shiitake mushrooms, stems discarded, caps thinly sliced; 3 carrots, cut into 1/3-inch dice; Salt and freshly ground pepper; 3/4 pound Broccolini or broccoli, peeled and cut into 1/2-inch pieces; 1 roasted red bell pepper, peeled and cut into 1/2-inch dice; 2 tablespoons unsalted butter; 1 small shallot, minced; 1/2 cup arborio rice; 2 cups chicken stock or canned low-sodium broth; 1/4 cup freshly grated Parmesan cheese; 1 cup panko (Japanese bread crumbs)