1 (1-inch) piece fresh ginger, peeled and chopped
4 garlic cloves, chopped
1 green chile, roughly chopped (seeded if you prefer less heat)
4 tablespoons canola oil
2 large onions, finely chopped
1 tablespoon tomato paste
1 1/2 teaspoons ground coriander
1 1/4 teaspoons ground cumin
1/2 teaspoon chile powder
1 large head cauliflower (about 1 1/4 pounds), broken into bite-size florets
1 (14-ounce) can unsweetened coconut milk
4 ounces unsalted cashews (about 3/4 cup)
1/2 cup frozen peas
1/2 teaspoon garam masala
1 small bunch cilantro, leaves chopped, for serving
1 lemon wedge, for serving
Cooked basmati rice, for serving
Place the ginger, garlic and green chile in a mortar and pestle with a pinch of salt. Mash until a paste forms and set aside. Alternately, finely chop the ginger, garlic and green chile together, sprinkle with a pinch of salt, then mash into a coarse paste using the flat portion of your chef’s knife.
In a large skillet with a lid, heat 3 tablespoons oil over medium. Cook the onions until golden, about 10 minutes. Add the ginger paste and cook, stirring, until fragrant, 3 to 4 minutes.
Stir in the tomato paste, coriander, cumin, chile powder and 1 1/4 teaspoons salt. Stir in the cauliflower and coconut milk and bring to a simmer. Reduce the heat to low, cover and cook until the cauliflower is tender, 10 to 12 minutes.
Meanwhile, heat the remaining 1 tablespoon oil in a small skillet over medium. Fry the cashews, stirring occasionally, 2 minutes. Transfer to a plate to cool.
Add the peas and garam masala to the cauliflower mixture and cook, stirring, 5 minutes. Season to taste with salt.
Top the curry with the cashews, cilantro and a squeeze of lemon just before serving. Serve with a big steaming bowl of basmati rice.