A conveniently packaged mixture of crimini, shiitake, and oyster mushrooms are sliced and ready for the skillet, saving time and boosting flavor.
1. Heat a large pot of salted water to a boil on high. Cook spaghetti according to package directions. Drain.
2. Meanwhile, in a 12-inch skillet, heat the oil on medium-high. Add the mushrooms and onions. Cook 10 min., until onions are golden, stirring often. Add the garlic and red pepper. Cook 1 min., stirring. Stir in the kale in batches, cooking until wilted. Gently stir in the beans. Season with ¼ tsp salt.
3. Toss spaghetti with mushroom mixture. Season with pepper to taste.