Or, you know, eat things that are quick to prepare. If I am at home[1] spend about 40 minutes per week on food shopping and can prepare a simple (perhaps boring) meal in 5 minutes and eat it in 10 or multitask while eating.

[1] When not at home, eg in the office, then I spend a lot more time getting/eating lunch, but its generally to get away from work so I would spend the time away from work anyway.