Heat the oil over medium-high hear in a large skillet with a lid. Add the cumin seeds, and cook 1-2 minutes, until they pop. Stir in the cayenne, turmeric, chile, bay leaves, and onion, and cook until the onion is tender, 3-4 minutes. Add the potatoes, tomatoes, cabbage, and a pinch of salt, and toss to combine. Cover, and cook, stirring occasionally, until the potatoes are soft, about 30 minutes. Taste and add more salt if needed. Serve hot.