Spoon the cooked vegetables into a casserole dish. Place the beef fillet onto a chopping board. Cut a pocket in the side of the fillet, leaving a 2cm/1in gap at each end. (Make sure that you only ...
Cook for 12 to 15 minutes, turning the chicken halfway through, until the fillets are golden and crisp. If you have a probe meat thermometer, use that to check the internal temperature of the chicken.
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