Veggie Soup (Vegan, Cleanse)

1 qt V8 juice (I like using the spicy hot!)
32 ounces vegetable stock (broth is fine, too, the stock is just richer. I buy unsalted)
2 bags frozen mixed vegetables (avoid starches- potatoes, peas, corn)
2 handfuls kale
1 handful spinach
1 red onion, chopped
1 TB minced garlic
1 tsp black pepper
throw it all in the crockpot, and let it go! 4 hours on high, 6-8 on low! Reheats well!