This sandwich has a pretty elaborate preparation but it isn't difficult and the flavour is sensational!
These are definitely sensational!!! It's a cross between a cheesesteak and a french dip. I partially froze the sirloin in order to get very, very thin slices. I also fried the veggies (used a whole package of baby portabella mushrooms, 2 green peppers and a vidalia onion) just until tender crisp and added them the last hour of cooking in the crock pot so they didn't get soggy. I used minced garlic vs. garlic powder, definitely add the red wine, added a couple of Tbsp. of low sodium soy sauce along with the worcestershire, and 1/4 tsp. of red pepper flakes. The horseradish and mustard combo is good, but would be more suited to roast beef or ham sandwiches. We used a garlic mayo (1/2 c. mayo with a couple tsp. of minced garlic or to taste). We opted for swiss cheese and put our hoagie rolls under the broiler to get them toasty and to melt the cheese then added the very well drained meat and veggies - we hate soggy sandwiches....... If we go for more of a cheesesteak version we'll opt for some melted velveeta as this does make a lot of leftovers! - 10 Feb 2010 (Review from Allrecipes USA and Canada)
This makes a delicious sandwich that makes LARGE portions. Next time I would serve it without a side dish. Didn't use a slow cooker and just simmered everything in a large pot on top of the stove for about 1/2 hour. Doubled the garlic powder and crushed red pepper. Only used 1/4 tsp. salt. Be careful of the horseradish/mustard mixture, though. I only made 75 per-cent of what was written, and I have about 1/2 left! This was truly a GREAT sandwich that I will make often. - 11 Jul 2005 (Review from Allrecipes USA and Canada)
I omitted the green peppers since I didn't have any, I used extra beef broth instead of the wine, and instead of spreading the horseradish on the bread, I added 2 TBSP. of it to the crock pot with the cooking liquid. I didn't use the mustard on the sandwich bread, and I made up individual sandwiches in hoagie buns, then heated them in the oven to melt the cheese, and it was a huge success! This is delicious, and a bit like a cross between a cheese steak sandwich and a french dip. I also used a lot of extra mushrooms since my husband and I love them, and this is one recipe I will be making over and over again! The leftover liquid from cooking used for dipping is so tasty, we loved it! Thanks! - 14 Oct 2007 (Review from Allrecipes USA and Canada)