Beans, Grains & Legumes with parmigiano

1 tablespoon extra-virgin olive oil 2 thinly sliced green onions 8 cups finely diced peeled butternut squash, divided (about 4 pounds) 1/2 teaspoon kosher[...]

2 cups pinto beans dried 4 cups beef stock prefer veal stock if possible 6 cups water 6 tablespoons olive oil 2 slices prosciutto rind or salt pork * 1 each[...]