Things that get better over night

I like to prepare my lunch the night before, but some dishes are not suitable for that. I am looking for more ideas for things that don't suffer from a night in the refrigerator, or, better, that even need to be made a night ahead. Anything that is marinated for example. I just made leek: Chop, cook in bullion, not too soft, then add some olive oil, lemon juice, salt, pepper, parsley, mustard and chopped gherkin. Cover and keep cool for a night. As this has to go into the part of my bento box with the watertight lid, the carbs have to go into the other compartment and thus must be "dry". I made a bunch of grain burgers and store them in the fridge, they can be packed frozen. A hard boiled egg goes nicely with the leek.
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