Ingredients:
- 3 tablespoons olive oil
- 1 onion, sliced
- 1/4 pound cremini mushrooms, trimmed and quartered (about 14 mushrooms)
- 1 1/2 pounds green beans, trimmed and slice into 1-inch pieces
- 2 teaspoons salt
- 1/2 teaspoon freshly ground black pepper
- 1/4 cup white wine
- 1/2 teaspoon red pepper flakes
- 1 bunch kale (1/2 pound), rinsed, stemmed, and roughly chopped
- 2 tablespoons lemon juice (about 1/2 a lemon)
- 3 tablespoons finely grated Parmesan