medium onion, chopped • large stem celery, chopped • medium carrots, cut into 1/4" thick discs (or however you like to chop carrots for soup) • garlic, peeled and smashed • oil • kale, washed well, stems removed, and rough chopped • optional: 4 cups arugula or spinach (I just happened to have arugula that needed to get used up) • unsalted liquid (water or broth of choice) • salt • sausage, cut into bite sized pieces • tomatoes, chopped or one 15 oz. can diced tomatoes (I just happened to have fresh ones that were starting to get wrinkly...) • bay leaf •