Fry the onions and garlic in oil, and then add the chopped peppers.
Add the sliced chicken and fry for a few minutes, then add the tomato puree and can of diet cola. Bring to the boil and simmer for about 20 minutes. Serve when ready.
You could add cooked noodles or plain cooked rice before bringing to the boil if you want to bulk the meal out.
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