I live in one of the cities in the UK with a large asian population and I hafta say, these places don't really existflojo
I have a chinese supermarket close to me, but it's just as crappy and tacky as a normal supermarket. Rows upon rows of ready made sauces. The fact they are imported and don't have english writting on doesn't impress me, nor does it a malaysian girl I know, who thinks it must be a front for a money launderying business! They have a few things I can't get elsewhere, but it's definately not a deli.
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