I have 2 young men, both brothers, that are 26 and 24 that work for me. Both are Civil Engineering E.I.T.’s. Every day the older one brings a cold hot dog and bun for lunch and the other brings a breakfast burrito. That’s all I have seen them eat everyday for that last 14 months.
They still live at home and are more concerned with investing money for their retirement.
If they are single, then I wouldn't give it a second thought. Most young guys are not terribly concerned about food. When I was single and in my 20s, you would find in my refrigerator: a 12 pack of beer, a squeeze lemon, and several frozen dinners. Evening meal might be a can of tuna, some crackers, a pickle, and a beer.
When I fixed my first meal for my future wife, she "was certain that it was going to be endured, not enjoyed," because she had never seen unprepared food in my kitchen. It wasn't a fancy meal, but it did require following several recipes. What she didn't know was that I had learned to cook in high school (My Mom insisted that each child prepare dinner once a week, so we would have to learn to cook).