I grew up liking both, but my mom's favorite was sausage which was more available at the grocer or butcher shop, plus she used it for other Italian dishes. I like it spicy, even hot, but mild sausage is just as tasty for this sandwich.
It's meal by itself, or serve with a side: slaw, cottage cheese, fries, or tossed salad.
Italian Sausage Sandwich, Chicago-Style
4 Italian sausage links, about 4 oz. in size
1 green pepper cut in strips
1 medium onion, sliced
2 cloves of minced garlic
4 slices of Provolone cheese or cheese of choice
4 hoagie buns
salt and pepper
Saute onions, peppers and garlic until soft and translucent on one side of the pan; season to taste. Saute sausage on the other of pan until browned.
Meanwhile open and lightly toast the buns, then spread on mayonnaise on each half. Slice each sausage down the its length to open butterfly style. Place cheese on bun, then sausage, then top with pepper and onion mixture.
Note: I've made these using warmed flour tortillas, and rolling everything up in them, and they're just as tasty.
Estimated Cost: $6.00 or less; $1.50 per serving or less with bun