Philly Cheesesteak Stuffed Peppers In this recipes defense, the filling did taste GREAT! However, the recipe didn't specify to pre-cook the bell peppers. I was wondering about this before, but I followed the recipe. IF I ever try this again, I would pre-bake the peppers until tender. Once you stuff them and put them in the oven, they are browned and ready way before the peppers are tender.