In a large pot over medium heat, warm the olive oil. Add the onion, sprinkle with salt and cook for 3 minutes, until translucent. Add the garlic, jalapeño, ginger, cumin and cayenne then stir together and cook for 3 minutes more.
To the pot, add the tomato paste and stir to combine. Add the diced sweet potato, creamy peanut butter, vegetable broth and water. Stir together then bring to a low boil. Reduce heat to medium-low simmer, cover and cook for 15 minutes.
Add the chopped collard greens to the pot, stir, then cover and continue to cook for another 15 minutes, until greens are wilted and sweet potato is tender.
Using the back of the spoon, mash some of the sweet potato to help thicken the broth. Boil uncovered for 5 minutes more. Serve warm with rice and garnish with cilantro, peanuts, and lime juice. Enjoy!