Peel and dice the sweet potatoes, cut the chicken breast fillet into strips, and cut the onions into wedges.
Fry in hot oil for about 10 minutes over low heat. Deglaze with the tomatoes and cook for about 5 minutes. Season with salt, pepper, chilli and Worcestershire sauce. Stir in peanut cream.
Put everything in a baking dish, sprinkle with peanuts and cheese, and bake in a preheated oven at 175 degrees for about 30 minutes.