Last of the Winter Vegetables Stew with Warm Spices

Serves 8 to 10. I made this recipe for a group of vegetarians, but feel free to add sausage or pancetta (just reduce the amount of olive oil a bit) and replace the veggie broth with chicken broth. 2 tablespoons olive oil 1 large onion, diced 2 medium celery stalks, diced 3 large carrots, sliced...