1 Tbsp olive oil, 1 cup leeks, 1 glove garlic, 8 cups of chicken or veggie broth, 1 large sweet potato, 4 cups of kale, 4 cups rainbow chard, 4 cups collard greens or other chard, 1/2 cup cream (optional), 1/8 tsp white pepper, salt to taste. (I use 1 bunch kale, and 2 bunches of rainbow chard, and green chard) You can use any type of greens you like but 3 large bunches are enough.
In a large pot, add oil and leeks heat until tender then add garlic and cook for 1 min.
Add broth, potato cubes, and greens and stir
Bring to boil, then simmer. Cover partially and simmer 1 hr. Remove and puree
This next part is optional if you want to add cream. I don't add cream to mine.
Return to simmer, uncovered until it thickens (10min)
Skim off foam if any and stir in cream, simmer 10 more minutes
Season with salt and pepper and garnish with lemon
I was surprised at how good this soup was. It would also be a great base soup if you wanted to then add ham, more carrots, and potatoes to make it a chunky soup. I added soup crackers to it and the boys loved it.