There are many dining options available near the IFJ. Usually 1-2 vegetarian options are available at each place, but less so for vegan options. (Meals are not provided by the organizers.)
Restaurants (clicking takes you to Google Maps):
Kwant Bistro
Radzik Kebab
McDonald's
Hindus Indian Food (Food truck)
Misc (clicking takes you to Google Maps):
Zaborowscy (Bakery)
Good Lood (Ice Cream)
Kraft Punk (micro pub and bottle shop)