Combine the spinach, strawberries, mandarin oranges, mozzarella and red onions in a large salad bowl.
Toast the almonds in a skillet over medium high heat. Add the brown sugar to the pan with the almonds and stir and cook until the brown sugar melts and coats the almonds. Remove from the pan and allow to cool before adding to the salad.
Poppy Seed Salad Dressing
Combine the salad dressing ingredients in a jar with a lid. Shake for 2-3 minutes, until the sugar is dissolved and ingredients combined.
Pour half of the dressing over the salad ingredients just before serving. Toss to coat, add more dressing as needed.
Note: nutrition facts are an approximation. This calculation was made with the full dressing being used. To make this a meal add shredded or grilled chicken.