Step 1Bring 1 cup water to a boil. Add the bulgur and one-half teaspoon salt; bring back to a boil. Lower the heat, cover and simmer until the water is absorbed, about 15 minutes. Remove from heat and let cool, then refrigerate.
Step 2In a large bowl, combine lemon juice, olive oil, parsley, scallions, mint, feta (reserving the extra ounce), Aleppo chile, sumac, kosher salt and bulgur. Cover and set aside.
Step 3Bring a large pot of salted water to a full boil. Cut the tops off the peppers, removing the veins and seeds. Blanch the peppers for 3 to 5 minutes (until they are pliable to the touch, but they shouldn't lose their color), depending on which peppers you are using and how large they are. Drain and reserve.
Step 4Heat the broiler. Stuff the peppers with the bulgur mixture and place on a baking sheet, reserving the tops for serving. If you're using long peppers, slit the sides to stuff them, then tie them up with kitchen twine. Crumble additional feta on top of the bell peppers or along the slits of the other peppers. Broil until the feta melts and the peppers get some color, 3 to 5 minutes.
Step 5Plate the peppers with their tops and serve.