potato onion
variety of the Aggregatum Group of Allium cepa, similar to the shallot, although producing larger bulbs
en-GB/pəˈteɪtəʊ ˈʌnɪən/
en-US/pəˈteɪˌtoʊ ˈʌnjən/
variety of the Aggregatum Group of Allium cepa, similar to the shallot, although producing larger bulbs