1 Bring a large saucepan of water to boil and prepare pasta according to package directions.2 While water comes to a boil, heat olive oil in large non-stick skillet over medium-high heat.3 Add a single layer of mushrooms, red bell pepper and onions and cook, without stirring, for about five minutes or until mushrooms become red-brown on one side. 4 Turn ingredients and cook about five minutes more, until other side is same color. Add broccolini, tomatoes and broth, and then stir in pesto.5 Bring to a simmer, and then add spinach and cooked pasta.6 Transfer to serving bowl and sprinkle with fresh Parmesan.