Preheat oven to 350° F. Spray an 8x4 loaf pan and set aside.
Shred one cup of zucchini with a food processor or cheese grater. Squeeze out excess liquid with cheesecloth or press dry with paper towels.
Preheat the oven to 400˚F. Line a large baking sheet with aluminum foil. Lightly coat the foil with cooking spray.
Put the beets on the baking sheet. Drizzle with 1 Tbsp. oil. Roast for 45 to 55 minutes, or until the beets are tender when pierced with a fork.
Soak the beans overnight using the package directions. Drain well in a colander.
Transfer the beans to a large stockpot. Pour in the water. Bring to a boil over medium heat. Cook for 1 hour and 30 minutes, or until the beans are soft, stirring occasionally.