Oven one opens touching hot potato (7)

I believe the answer is:

roastie

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'hot potato' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'oven one opens touching' is the wordplay.
'oven' becomes 'oast' (type of kiln).
'one' becomes 'i' (Roman numeral).
'opens' is an insertion indicator (one set of letters makes an 'opening' in another).
'touching' becomes 're' (both can mean concerning or relating to).
'oast'+'i'='oasti'
'oasti' inserted inside 're' is 'ROASTIE'.

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