Halved this for lunch with my husband today. I found the onions a little too sweet even though I accurately measured them out and used yellow onions instead of red. Left out the mustard since I didn't have any. I usually make my caramelised onions with a bit of chopped fresh rosemary and more vinegar; maybe this makes me more posh, but the onions were lacking anything special in flavour besides the onion and sugar flavour. Bangers are pork sausages, lightly flavoured, about 4 inches long, 8 to the pound/lb. and you are suppose to cut them in half lengthwise so they do not roll around on the slice of bread so easily.
I halved this. I used some fresh bratwurst-style sausages (not sure I know what a banger is). I used bread (the new picture shows rolls), which made the sandwiches a bit hard to eat. DH took his apart, but ate every bite (a true compliment from him). The onions were wonderful. I used about 1 T of brown sugar - no kitchen scale that works in grams, and I had forgotten to convert the recipe before printing it. I will definitely make this again. I might use bread that is more user-friendly, or smaller sausages. I think even breakfast links might work with this.
These were SO GOOD!!! We LOVED them with the sweet caramelized onions!! Pure HEAVEN! TY Sylvie!