How to Make It
Heat the olive oil in a large skillet. Add the mushrooms and carrots, season with salt and pepper and cook over moderately high heat for 5 minutes. Add the Broccolini and cook for 2 minutes. Stir in the red pepper.
Preheat the oven to 350°. Melt the butter in a medium saucepan. Add the shallot and cook over moderate heat until softened but not browned, about 4 minutes. Add the rice and cook for 1 minute. Add the stock and bring to a boil. Add the Parmesan, cover and cook for about 17 minutes. Stir the rice and panko into the vegetables and season with salt and pepper.
Butter a 6-cup baking dish and spread the rice in it. Bake for about 45 minutes, or until lightly browned. Let rest for 10 minutes before serving.