The impetus for our Upcycled Vegetable Soup was to use vegetable scraps traditionally sent to the compost bin to create a delicious and nutritious pureed soup from normally discarded ingredients. After sweating onions and garlic in olive oil, our eighty-gallon steam kettles get filled with a hodgepodge of thoroughly washed celery trunks, root vegetable peels and portobello mushroom stems. We have found that the heartier ingredients like the peels and celery lend themselves to pre-roasting to intensify flavor. Stale bread rolls as well as tofu and quinoa are added to boost nutritional content and to add texture and enrich flavor.
For the home cook, the ad hoc nature of the recipe lends itself to improvisation. I would suggest that as you prep vegetables throughout a week of cooking meals, you save the edible scraps in a Ziplock bag that goes into your refrigerator. Once that bag is filled, your ready to make your soup. The general rule is to use parts of vegetables that you would not normally eat, but that are entirely edible once cooked. Also, do not be afraid to clean out your vegetable compartment of forlorn veggies on their last legs. Have a single Yukon Gold potato or a couple of swiss chard leaves? Don’t know what to do with an odd collection of fresh herbs or a handful of grape tomatoes? We give you permission to toss them in the pot!
Finally, if you have some grains, pasta or stale bread lying around, they can add textural interest, flavor and body to your soup. Seasonings and flavor profile are also completely up to you. This recipe should be used as guideline. Feel confident in knowing that you are making something delectable out of what you might normally be throwing away.