I have been planting Simpson Blackseed lettuce for several years. It grows fast and can be planted several times each year.
Yes, it has been a good producer for me in the past. I actually managed to grow a patch last summer in spite of the horrible heat and drought.
I put it in 3 x 12 inch pots and set in on the patio under a shade tree and watered it a little everyday. It gave me some lettuce all during the summer with out bolting and really kicked in that fall. Still had some left that went on growing through most of the winter under a row cover and straw.