Cook two dishes at a time on the stove, with the dhal in the Instant Pot, and plan to finish about 1 hour before you eat. That leaves time to clean up, get ready, and handle anything that goes wrong, like a pot boiling over. All of these dishes reheat well.
The curry base: the baigan curry, channa and aloo, and mango curry all start the same way. Cook a diced onion with a pinch of salt in oil until soft, add grated garlic for a minute, then add some of the curry paste. Cook it, stirring, until it thickens and dries, 3 to 5 minutes. Add a splash of water if it starts to stick.
Start the katahar first: get the katahar curry simmering. It needs about 1½ hours, so it goes first. Start the dhal next: make the dhal on the stovetop, or use my Instant Pot dhal so it cooks on its own while you focus on the curries. Keep it warm until serving, and hold off on the chunkay until the end. Baigan and eddo curry: make the curry base. Add the eddoes, peeled and cut into 2-inch wedges, and stir to coat. Then add the eggplant, peeled, diced and kept in water until now. Sauté 2 minutes, then cover and simmer on low, adding warm water as needed, until the eddoes are fork-tender and the eggplant is soft.
Channa and aloo: when the baigan curry is done, move it off the heat, covered. Make the curry base, then add the drained chickpeas and cubed potatoes and sauté a minute or two. Add the liquid from the can and about 1 cup of water. Cover and cook, stirring now and then, until the potatoes are tender and the sauce thickens into a gravy.
Mango curry: once the katahar is done, move it off the heat and cover. Then make the curry base. Add the peeled, seeded green mango pieces, the brown sugar, the whole wiri wiri peppers and about 1½ cups of water. Boil 5 minutes, then simmer on medium-low for about 20 minutes, until the mangoes are soft and melty.
Start the rice. Put it on a back burner and let it steam while you finish up. Finish with the quick dishes: cook the Guyanese pumpkin, then the bhaji, last, since spinach is best fresh. Just before serving: for a gathering, keep the curries on warmers. For a family meal, reheat them in their pots on the stove or in the microwave. Then chunkay the dhal: heat a little oil, add garlic and geera until fragrant, and pour it into the dhal.
Plate it: put rice in the center of each leaf or plate, spoon each curry around it, and pour the dhal over the top last. Garnish with scallions and cilantro. Eat with your right hand, if you like.