Put 1/2c strawberries in blender, blend until smooth. Add sugar and vinegar, blend. Add yogurt, blend. Pour into bowl, stir in poppy seeds. Refrigerate until ready to use.
2Layer Spinach, strawberries, mango, cheese, and nuts on plates, drizzle dressing over.
3Other ideas I had for this were dried cranberries, raisins, grapes, or kiwi. All would have been great. The measurements on the actural salad can vary, just use what you have and what you need for each plate.