Winter Minestrone

2 1/2 cups peeled winter squash, such as butternut squash, cut into 1-inch cubes

1 1/2 cups cubed potatoes

2 medium fennel bulbs, trimmed and cut into 1-inch pieces

1 large onion, chopped

2 cloves garlic, minced

1 15 ounce can red kidney beans, rinsed and drained

1/2 teaspoon dried sage, crushed

4 cups chicken broth or vegetable broth

1 cup dry white wine

4 cups chopped kale or fresh spinach