Heat peanut oil on medium heat in large pot.
Add chopped onion and red pepper.
Cook on medium heat until onion is translucent. About 5 minutes.
Add minced garlic.
Keep on medium heat for about 1 minute. (stir while cooking to avoid burning)
Add tomatoes, pepper, salt, and red pepper flakes.
Continue cooking on medium heat for 7 minutes, stirring often.
Add peanut butter and Silk cashew milk (or broth) and cook on low, stirring often, until heated through.
Season with additional salt and pepper if desired.
Serve over rice, if you like.