I agree with Barbara, the poppies and salvia wintersow well for sure, as do petunias. I've never done lettuce but others do, it's a cool-season crop that should do well.
Morning glories- the only ipomoea I've done was alba (moonflower vine). I did as well as most in the north. That is, it bloomed too late for me (like September) but I imagine it would be good in your zone. For earlier bloom, they'd have to be started early inside under lights.
Peppers are another warm germinator. It's not one I'd do up here in Ohio. For your zone, I don't know.
Spinach mustard?? What the heck is that???
It sound like something you southerners would eat, but this Yankee never even heard of it.
Karen