Today I went to Feast food festival in Tobacco dock (www.wefeast.co.uk).
I spent the whole evening uploading pictures and hope you get inspired to go on Sunday as it's the last day of the festival :-)
There are afternoon and evening sessions (I went to the evening one). Tickets are cheaper if booked in advance through Yplan app or at the event website (use code "Londonist" to get two for one).
Though the entrance is not free food is reasonably priced and the atmosphere is great. Food vendors include restaurants as well as street food stalls offering a selection of food for any mood or taste!