Helmans vegan mayonaise is ridiculously delicious you could use that for mini sandwiches with tuna or avocado, salad and olives or to make your own coleslaw.
You can mix it with oatly Vegan creme fraiche to make other dips, I did a coriander and fresh lime (juice and rind one)
Or use it for a coronation chicken - wow I really fancy coronation chicken now.
Get some dairy free spread, you can have sandwiches, salads, mini burgers, chips, crisps, dumplings/ casseroles, curries, cold meats, olives, breadsticks, pasta pesto, roasted veg.
You could get a vegan pastry and make a pie or a tart - you could do a meaty filling or a creamy one with oatly.
The coconut collaborative brand do good puddings too.