Butternut Squash Risotto without onion

5 1/2 cups chicken stock or 5 1/2 cups vegetable stock or 5 1/2 cups canned broth 2 tablespoons unsalted butter 1 large onion , chopped 1 butternut squash,[...]

2 each shallots minced * 2 each garlic cloves minced 2 each celery stalks diced fine 2 tablespoons olive oil 1 tablespoon butter 1/4 cup arborio rice 3 1/2[...]