You could top the peppers with grated cheese and breadcrumbs before baking in the oven.
Agreed with Avonhurst here - the quantity is wrong. So basically just use SIX PEPPERS, not just four. You'll need SIX. :D But honestly, you can eat the rice+mushrooms+tomatoes combo with bread or just on its own, perhaps even with a salad when there's too much left. Nonetheless, it was super delicious! Loved it. - 07 May 2014
Just baking stuffed peppers first ti me one large onion 12 small fresh tomatoes gently fried in oil Fine ychopped then stuff 10 minute boiled peppers and put in prleheated oven gas mark 5 for approx ten mins ,serving with slow cooked jacket potatoes,sprinkle generous amount of salt over potatoes before cooking for a soft potato with crispy jacket - 12 Feb 2015
Simple and tasty, quantity is all wrong. We used average sized peppers, but were left with more than half the ingredients. - 07 Jul 2013