nutritional yeast
I add the recommended amount and it gives a shit load of B vitamins + whatever else
You could do some meal prep. Chop or puree them, put them in the freezer.
Personally I'm not doing that either, I hate the taste and texture of lots of vegetables and stuff like onions or broccoli don't mix well with my IBS. And I don't have much space in the freezer. But I do know that most people are not like me.