philly cheesesteak sloppy joes

i thought that this recipe was really good... my son didn't feel the same way even though he helped me prepare it. i had a feeling that he wasn't going to like it so i had him help me to get him excite about trying it... he DID try it without a fight (these days that says alot because he refuses to try anything new without trying to get some sort of reward for it) but thats as far as he got... which is more than i can say for my husband- he refused to even try it because it has onions in it.

philly cheesesteak sloppy joes
from http://www.chef-in-training.com/2012/01/philly-cheesesteak-sloppy-joes.html

1 pound ground beef
1 medium-sized onion, chopped
1/2 green pepper, chopped
2 tablespoons steak sauce ( next time i will only use 1 tbsp)
1 cup beef stock
black pepper
4 dinner rolls
4 slices provolone

In large skillet over medium-high heat brown ground beef, about 5-6 minutes .Drain fat and  return to heat. Add the onion and green pepper and cook another 3-4 minutes, until the vegetables start to get tender. Stir in the steak sauce and beef stock, season with pepper, bring to a bubble and cook about 2 minutes.

Split open rolls and remove most of the soft insides, leaving a bed to hold the meat mixture.

To serve, place a scoopful of the meat mixture onto the bottom of the rolls, then top with the cheese and throw in toaster oven to melt cheese.