I've made this recipe twice now. Last night I didn't have any orange zest but the recipe was still great. You would think that the mint would overpower the flavors but it doesn't. One pepper is plenty per person. You could probably stuff three peppers even four if they are small. I'm having the leftover stuffing with a little more rice and the leftover sauce mixed up for lunch today with a side of leftover broccoli. I sent the recipe to my brother who is vegan with the suggestion of substituting beans or lentils for the meat.
ps It would really help to do what a previous commentor suggested and cook the brown rice earlier.