Spicy Vegetarian Cauliflower & Mushroom Spaghetti

Cook pasta for 1 minute less than the package directions. Reserve 1 cup pasta water, then drain.

Meanwhile, heat oil in a large skillet over medium heat. Cook cauliflower, mushrooms and 1/4 teaspoon salt, stirring occasionally, until the cauliflower is starting to brown, about 10 minutes. Add garlic and cook, stirring, for 30 seconds. Stir in wine, increase heat to high and cook, stirring occasionally, until almost evaporated, about 2 minutes. Stir in peppers, olives and butter. Add the pasta along with the reserved cooking water; simmer until the water is almost evaporated, 1 to 2 minutes more. Stir in parsley, the remaining 1/4 teaspoon salt and pepper.