La confiture

I think you would normally say 'confiture de fraise'. But on this occasion the speaker has dropped the word 'confiture' to say, effectively, 'No, but we've got some strawberry'.

Merci Tom,

Intrinsically, I understand ,"on a de la fraise", but wouldn't it be more correct to say, "Non, mais on EN a de la fraise."? Meaning we have some strawberry? Or, are both versions correct? 

Merci,

'On en a de la fraise' would mean 'we have some strawberry of [something]' - which isn't what you want to say.