Once, when I was about to make the Ethiopian national dish Zigni, I couldn't find any beef. I used frozen chicken breasts instead, and slightly modified the recipe. I must say that I was stunned at the result! Try to find something better than cooking oil. I used canned duck fat. Don't worry too much about the amount of fat. The other ingredients are virtually fat-free. Recipes for berbere pepper can be found on Recipezaar.