That Red Giant Mustard was the variety I had one plant of last year that came in a 6 pack of mixed greens.
Yes, once it gets going making those big juicy leaves it is absolutely delicious, especially the leaf stems raw. That's right, raw, fresh picked, yummydelicious garden munchie! Midseason last year the aphids began, but once I put about 12 pounds of diatomaceous earth in that bed, something like 4 by 12 feet, after washing them off and doing the hand squishings, bleyeech, the aphids were pretty much gone. So, as yummy as they are to humans and Neanderthals, they are yummy to aphids too. Just do a good proactive preventative remediation to beat the aphids.
I was actually thinking about crossing this Mustard with a Rutabaga! First I gotta grow them both though, and I'd have to get the right variety of Rutabaga. Reminds me to double check, but I was websurfing one day and found that in Maine along the coast there was a shipwreck a long time ago. Someone found roots in a box and planted them and very large white and green Rutabagas grew. The biggest and ugliest Rutabaga variety of all. So that is a very rare heirloom Rutabaga. Too ugly for any seed catalog to want. So I want it! And I want to cross it with this Giant Red Mustard.
Wouldn't it be cool to have a slow growing Rutabaga that gives yummydelicious leaves also? And, one that makes a Rutabaga too ugly for anyone else to want??? (Ha! Reminds me of an old friend who said he married his wife because she is too ugly for anyone else to want!) Sorry about that, gettin old enough to have side stories. The F2 selections of the cross I am sure would be an interesting bunch!
Gonna get to that search again, on Google...