We've started to do 'bowls' for family and friend gatherings. Each person brings a few things. Think of all the options at a Chipotle or similar. You can set a theme for the bowl like Mexican, Indian, Korean etc. It seems to work well for dietary restrictions as you build your own bowl. Also I think it allows people to put in as much or as little work as they want. The challenge is coordination, with small groups a group chat works but large groups you need a sign-up spreadsheet with categories.