For the curry paste: Process pepper, onion, garlic, chilli peppers and cumin in a food processor with a few tablespoons water until you have a thick paste.
Heat a little oil in a large pot. Cook the meat, stirring often until browned and no longer pink.
Add the curry paste and stir fry for 2-3 minutes or until everything smells amazing.
Chop eggplant into bite sized pieces. Add the eggplant, 1 1/2 cups water and the fish / soy sauce. Bring to a simmer.
Cook, covered for 5-10 minutes or until eggplant is very tender. Taste, season and serve with coriander leaves on top.