1/4 tsp curry powder (optional, if used please use good quality, fresh powder!)
Cook spinach according to package directions; drain thoroughly.
Place all ingredients in blender and process until smooth.
Chill for at least 3 hours before serving with vegetables or chips. For a milder dip, mix in a little cottage cheese before serving.
The tip tastes completely different depending on whether or not you use the curry powder, so do try both versions. :) I usually make it without, but that's only because some folks don't enjoy curry - myself, I'm hard pressed to choose version I prefer.