I do it the much the same way as everyone else, peel, slice in 1/4-1/2" slices, dip in beaten egg, parmesean bread crumbs, saute in olive oil, just to lightly brownl. Layer it with ground meat browned with chopped onion and garlic, ricotta, and sauce, mozzarella on the top. Basically just like you would lasagne using the eggplant instead of noodles. Just use the feta instead of ricotta. Bake at 350 for about 30 minutes.
Make sure to the eggplant on paper towels after you saute to soak up the grease and keep it from getting soggy. I don't saute it very much, otherwise it will turn to mush when baked,