I lived in Houston for 30 years and I love Antone's Po-Boys with ham, salami, provolone, chow chow , mayo and dill pcikles.
I bought a few jars and deconstructed the recipe and this one is very close:
****************
Green Cabbage - 1/2 cabbage shredded with Cuisinart shredding disk
Sweet Green peppers - 1/4 cup chopped (I shred along with cabbage)
Onions - 1/2 medium onion chopped (I shred along with cabbage)
Vinegar - 1/3 cup - any kind of vinegar - red or white
White or Brown sugar - 1/4 cup
Celery seeds - 1 tsp
Dry Mustard - 1/2 tsp - like Coleman's
Tumeric - 1/2 tsp - this gives a yellowish color
Tomato paste - 3 tsp
Ketchup - 8 tsp
Smoked Paprika - 1/2 tsp
Arrowroot or Cornstarch - 3/4 tsp stirred into cool water
Cayenne papper - 1/8 tsp
Salt - pinch
*****************************
Put all this in a covered pot and simmer on low heat for a few hours. It'll get soft and turn into a reddish translucent relish. Don't add any water. As it simmers, it'll get liquidy.
Let cool and pack into a jar and refrigerate. I found it'll last almost forever - especially if you stir it once in a while.
*********************
A trick: This can be a messy sandwich to eat as the chow chow can run out the bottom and onto your chin, shirt, etc. I noticed at Antonios watching them make the Po-Boys, they mix the mayo and the chow chow in a bowl. When they make a sandwich they'll put that on the bread and it won't run. The mayo binds it.
HAPPY EATING!!!!!
.