As with most soups, there is a fair amount of prep. For this recipe you need to peel and chop the onions, chop the peppers, mash the garlic and get the rest of the ingredients ready to add to the pot.
In a large soup pot, sauté onions, bell peppers and garlic in oil until onions begin to brown around the edges, about 7 minutes.
Add the tomatoes and juice, broth, pepper and red pepper flakes. Simmer, uncovered, over low heat about 15 minutes.
Add rice, cover and simmer until rice is tender, about 30 minutes.
Add the peanut butter; whisk until smooth.
Heat to a simmer and serve immediately, garnished with chopped roasted peanuts.