I would go three ways:
- mainly grow mushrooms and fungi combined with some high fat plants. Fungi and mushrooms can be easily cultivated and need less care than many vegetables. As they need no light they can be grown densely packed with packets of soil out of which the fungi can grow into all directions.
- build biofilters for waste water that can double to grow edible algae. And other algae that can be used as fertilizer.
- breed insects that feed on (plant) waste and provide lots of protein
I did not specify the kind of high fat plants because I lack the expertise when it comes to what would work. But there are an abundance of plants that produce oil. Soy, Rapeseed, Helianthus for example.
Here is an called Why Martian Settlers Will Eat Potatoes, Insects, Algae and Mushrooms. It is about food that could feed settlers on mars. They suggest potatoes instead of oil-plants but the rest is more or less what I suggested.