1In 3-quart saucepan, heat 1 tablespoon of the oil over medium-high heat. Cook beef in oil 5 to 6 minutes, stirring occasionally, until brown. Remove from saucepan; set aside. Drain fat from saucepan.
2In same saucepan and with heat still on medium-high, add remaining 1 tablespoon oil, the squash, onion and 1/2 teaspoon salt. Cook, stirring occasionally, 3 to 4 minutes or until squash begins to brown.
3Add cooked beef to saucepan, then add tomatoes, black beans, pumpkin, cumin, red pepper and chili powder. Cook 12 to 15 minutes, stirring occasionally, until squash is tender. Season with salt and pepper. Serve with green onions sprinkled on top.