Everybody: Plant some lettuce!

[Bongo Prophet]

12. And many others, depending on area

So many more, even in Texas heat.

As you say, Amaranth and purslane just pop up once you get some out there and spread around by humans or by birds.
Lambsquarters, turk's cap, mulberry (berries and leaves), even ornamental sweet potato leaves, garlic chives...all delicious/nutritious.

Garlic chives in your scrambled egg is an easy touch that tastes better than without.
Watch cooks from around the world to get better ideas.

It's a shame the permaculture forum here is so dead.