Now listen folks, let me warn you! this recipe is not for the faint-hearts. Ghost peppers or what we call as "bhoot jolokiya" are the hottest peppers in the entire world!! so, needless to say, any sauce which uses this ingredient will be astronomically hot. So, while the most authentic recipes for hot sauce require 6-7 ghost peppers for the procedure, i feel comfortable in using just 2-3 of them and substituting the rest with the dried kashmiri red chillies, which are much milder! these fajitas with a filling of tofu and hot sauce are pretty spicy but not unbearably so. At the same time, they are saucy and delicious! mozzarella cheese compliments the filling quite nicely and also, reduces the spice factor a little bit. While making this very hot sauce, please be careful and wear gloves at all times while handling the ghost peppers. This is a great recipe for all the spice lovers out there!!.