2 tablespoons butter
1 tablespoon olive oil
1/2 winter squash (Butternut, Blue Hubbard, or Red Kuri squash, peeled, seeded and diced.
1/2 teaspoon kosher salt
1/4 teaspoon chili powder (more to taste)
Freshly ground black pepper
1 bunch greens (kale, collards, or chard) leaves torn, stalks discarded