Cut the meat into strips and the peppers into small pieces. Halve the onions and cut into coarse rings. Chop, press or slice the garlic. Core the peppers and cut into rings, core and finely chop the piri piri.
Briefly rinse the kidney beans and corn in a colander. Cut the peeled tomatoes into pieces. Mix the sour cream with a little milk and 1/2 teaspoon salt until smooth. Finely chop the parsley. Cook the rice in salted water according to the instructions on the packet.
Heat some oil or clarified butter in a large, non-stick pan. Sear the meat together with the garlic (possibly in two portions so that it does not boil in the meat juice) and season with salt and pepper. Take the meat out of the pan before it is completely cooked, otherwise it will get dry.
Heat some oil in the pan again and fry the pepper pieces together with onions. After about 5 minutes add the tomatoes and the pizza sauce as well as the peppers and piri piri. After another 5 minutes add the corn and kidney beans and let simmer.
When the pepper pieces have reached the desired degree of doneness, put the meat back in the pan and heat for 5 minutes while stirring.
Serve with rice, add a dollop of sour cream and sprinkle with fresh parsley.
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