How to Make It
In a large deep skillet, heat 3 tablespoons of the oil until shimmering. Add the onion and cook over moderately high heat, stirring occasionally, until lightly browned, about 5 minutes. Add the ginger and cook, stirring, until fragrant, about 1 minute. Add the tomatoes, garam masala, salt, cayenne and turmeric and cook until the mixture has thickened slightly, about 4 minutes. Add the carrots, potatoes and water and bring to a simmer. Cover and cook over low heat until the vegetables are just tender, about 20 minutes.
Meanwhile, heat the remaining 1 tablespoon of oil in a large nonstick skillet until shimmering. Add the tofu and cook over moderately high heat, shaking the pan often, until golden all over, about 5 minutes. Using a slotted spoon, add the tofu to the curried vegetables along with the peas. Cover and cook over low heat until the peas are tender and warmed through, 4 to 5 minutes. Serve hot.