This is an easy and delicious dinner that can be on your table in 30 minutes. Sauté the mushrooms, onions, and stem ends of the broccolini while the pasta water heats up. Add garlic. Put the pasta in the boiling water. When there is 5 minutes left on the pasta add the broccolini tops to the vegetable mixture and a little of the hot pasta water. Cover. Add the cooked pasta to the vegetables, a teaspoon of olive oil, and a 1/2 cup of the pasta water, stir and cook for a couple of minutes. Garnish with some good olive oil.