Most economical veggies to grow?

[Got Worms?]

Economically speaking, what do you consider the better veggies to grow for your family in your garden?

I use as a criteria; square footage used, length of time the space is taken by that crop, total pounds at harvest, price per pound in store.

My list would be: tomatoes, green bunching onions, leaf lettuce, summer squash.

The rest of the things I grow for solely taste, without considering economy. How about you?
Charlie