Input & OutPut Tax on Susidised Casnteen - Goods and Services Tax - GST

We have an canteen at plant having more than 250 Employees, canteen contractor billing at 5% GST. We are providing subsidized foods to employees workmans supplied through Manpower Supply contractor, nominal amount will recover from Employees salary Manpower Supply contractor. Question 1 - Whether We can avail GST Input Credit on Canteen supply bill charged at 5% Question 2 -Whether We can pay GST at 5% on the recovery amount from Employees salary or on Open market Value Question 3 -Whether We can pay GST on 5% on the recovery amount from Manpower Supply contractor? Also specify other options available with permutation and combination which reduces the cost to company