Boil, peel and dice the potatoes; set them aside.
Sauté the onions in the olive oil until they turn translucent.
Add the curry leaves, cumin, fennel seeds, chili flakes, salt potatoes and sliced bitter gourds.
Sauté the mixture for a few minutes and cover to steam.
Sprinkle in the garam masala shortly before turning off the heat and stir it in well. Continue sauteing for a couple of minutes and serve al dente.