Place spinach, tomatoes, onions, turmeric, ginger and chilies in a saucepan with 1 cup water. Cook, covered, 15 mins over medium-low heat. Remove from heat and cool. Blend in an electric blender to a creamy consistency. Heat butter/oleo in a saucepan. Add spinach mixture and salt to taste. Cook for 5 mins over low heat. Add lemon juice and serve.