Greek Risotto with Fresh Spinach and Feta

"Heat 2 tablespoons olive oil in a large skillet and saute the onions, scallions, and garlic. Add rice and saute, stirring, for 3-4 minutes. Season with salt and pepper.Add the spinach in batches until it is wilted. It will decrease tremendously in volume. Stir to combine thoroughly with the rice. Add 1 to 1 1/2 cups of water, cover the pot, and cook the spinach and rice until very tender, about 45 minutes. Add more water during cooking if necessary. Ten minutes before removing from heat, toss in dill. Season with lemon juice and vinegar just before removing from heat. Serve in a bowl or on a platter, pour on remaining oil, and sprinkle with the crumbled feta."