You need a microwave oven like mine, with the apparently-by-design feature (mentioned as an aside in a Technology Connections video some years ago, as I recall)

You need a microwave oven like mine, with the apparently-by-design feature (mentioned as an aside in a Technology Connections video some years ago, as I recall) that one can program the seconds up to 99. 11 minutes is 10:60 . (-: