OK, this is pretty basic for most normal human beings, but I'll spell it out for you and your acolyte - - a one-man restaurant where the boss does all the work himself is a place I never have eaten in in my life. As stated in my post.
A Greek mom-and-pop restaurant operated by a husband and wife is a good description of several great Toronto restaurants, Windfields, The Good Bite, Seniors, a little place that closed down years ago near my office that I can't even remember the name of - - they're generic small Greek restaurants wit $5 or $6 breakfast specials, good lunches, the boss, his wife, their daughter or son, a son-in-law or daughter-in-law, maybe a couple of long-time waitresses - - that's a mom & pop restaurant as far as I'm concerned, although to the literal-minded but extremely stupid, it might appear that mom and pop have no one at all to help out.
If you disagree, I propose putting it to the members: does "mom and pop" restaurant imply a strictly two-person operation, or can mom and pop have some help and yet the operation if small enough would still be characterized as "mom & pop?"