Green Soup

I'm not saying this is a bad dish...but it isn't a yummy as I had hoped.   Don't make this soup unless you really like split peas and greens, you will be disappointed.   Once I added extra lemon juice it tasted much better.  I think the addition of some red pepper flakes during cooking would also go far to brighten the taste and though optional I think it should be served with Greek yogurt or sour cream to give it some tanginess.   

Ingredients
 1 onion, chopped
 4 cloves garlic, chopped
 3 carrots, cut into chunks
 1 sweet potato, cut into chunks
 1/2 cup split peas, rinsed and drained
 6 cups water
 8 ounces mushrooms, halved
 2 pounds chopped greens—any combination 
 2 teaspoons oregano
 1 teaspoon celery salt (optional)
 1 teaspoon thyme
 1/2 teaspoon freshly ground black pepper
 3 tablespoons nutritional yeast
 1/2 cup finely chopped fresh or frozen basil (or about 2 tablespoons dried*) 
 1 tablespoon cashew butter (optional, but good)
 1 tablespoon lemon juice
 salt to taste
 –Optional Garnishes:
 Lemon slices
 Plain soy or Greek yogurt
Instructions
1. Place the first 6 ingredients into a large pressure cooker, seal, and bring to high pressure. Reduce heat to maintain high pressure for 8 minutes. Remove from heat and allow pressure to come down naturally while you prepare the remaining ingredients. (For stove-top cooking, simmer until split peas are tender, about 30 to 45 minutes.  I used the stove top method)
2. When the pressure is down, use a hand blender to puree the soup. Or, blend in batches in a regular blender—be careful because this is hot and splatters easily. Add the next 6 ingredients (*and the dried basil, if you’re using it) and cook for about 30-45 minutes, until greens are completely tender. Add additional water if necessary to prevent soup from becoming too dry.
3. Add the remaining ingredients and use your blender again to puree the greens and mushrooms until fairly smooth. Check seasoning and add salt as needed, and thin with a little water if you find it too thick. Serve with additional lemon or try it with a spoonful of yogurt stirred in.
Servings: 4 officially, I think more like 6-8 because who wants 2+ full cups of this for a meal?