Recovery for foods to worker

Yes. Under GST, Tax is charged on supply of goods. This transaction falls under schedule 2 of GST Act.
However, if you do not charge them any amount (i.e. free food ) then it will not attract GST because you can classify it as a gift to employee, which is exempted upto 50,000 Rs in a financial year.

If Canteen facilities is compulsory as any law than all input credit is eligible for canteen expenses. if Canteen is not madentory, then rules as per GST no tax liabilities on without consideration but you have to reverse input tax credit on such item.which provide with no consideration or under valuation.