Heat oil over medium high temperature for about 5 minutes until quite hot. Drop one seed of cumin to test if it sizzles; if it does, the oil is hot enough. Add the rest of the cumin and cook for 30 seconds.
Add onions and lower the temperature to medium, cooking until the onions are translucent, about 10 minutes. Add the chopped tomatoes, fresh ginger, seasoning pepper and Scotch bonnet pepper, cooking for another 10 minutes or until the tomatoes are nicely cooked and the oil starts to pool slightly at the top of the pot.
Add the chickpeas, callaloo or kale, scallions, garam masala and coconut milk, cooking for a further 5-10 minutes until the greens are wilted. Turn off the heat and let sit for about 5 minutes. Serve with naan or pita bread.