This roasted eggplant and feta dip gets a kick from a fresh chile pepper and cayenne pepper. There are countless variations on this classic Greek dip. Out-of-season eggplant or eggplant that has been heavily watered often has an abundance of seeds, which make the vegetable bitter. Be sure to taste the dip before you serve it; if it's a touch bitter, you can remedy that with a little sugar. Serve with toasted pita crisps or as a sandwich spread.