1.Place chickpeas, beans, flour, parsley, mint, onion egg, garlic and spices into a food processor. Process until almost smooth, stopping to scrape down sides. Transfer mixture to a bowl. Chill, covered, at least 1 hour.
2.Meanwhile, preheat a char-grill on high. Cook eggplant 1-2 minutes each side, until golden brown.
3.Using floured hands, roll rounded tablespoonfuls of falafel mixture into balls.
4.Heat oil in a wok or deep saucepan on high. When hot, deep-fry falafel balls in batches 5-6 minutes, turning, until golden and crisp. Drain on paper towel.
5.Divide baba ganoush, rocket, onion, eggplant and falafel along each bread. Roll to enclose.