Peanut Soup

Ingredients

• 3/4 cup roasted and shelled peanuts
• 2 tablespoons peanut or neutral oil
• 1 medium red onion, halved and thinly sliced
• 1 tablespoon peeled and minced fresh ginger
• 1 tablespoon minced garlic
• 1 pinch cayenne or more or less to taste
• Salt and freshly ground black pepper
• 6 cups vegetable stock or water
• 1 lb sweet potatoes or yams, peeled and cut into thick slices
• 8 to 12 plum totatomes, cored and halved (canned are fine; drain and reserve liquid for another use)
• 1/2 pound collards or kale, washed and cut into wide ribbons
• 1/4 cup chunky peanut butter