Puree half of the onion, 2 tablespoons water, the ginger, garlic, curry powder and 1/2 teaspoon salt in a food processor until almost smooth; set aside. Mix the yogurt with 1/4 cup water in a small bowl; set aside.
Heat the vegetable oil in a large skillet over high heat. Add the remaining onion and cook, stirring occasionally, until lightly browned and tender, about 3 minutes. Add the turkey and cook, breaking up the meat with a wooden spoon, until lightly browned, about 3 minutes.
Add the onion-spice mixture to the skillet and cook, stirring occasionally, until dry, about 4 minutes. Reduce the heat to low and stir in the spinach and the yogurt mixture. Cook, stirring, until warmed through, about 3 minutes. Stir in the cilantro and 1/4 teaspoon salt. Serve over rice with more yogurt and topped with cilantro.
Photograph by Justin Walker
Courtesy of Food Network Magazine