Step 1

Whisk the vinegar, sugar and 3/4 teaspoon salt together. Place 1/4 cup in a microwave safe bowl. (reserve the rest for later) Microwave about 1 minute. Add onions, stir and let sit for 30 minutes.

Step 2

Whisk oil, mustard, poppy seeds, and 1/2 teaspoon pepper into the reserved vinegar mixture.

Step 3

In a large bowl, combine lettuce, spinach, almonds and strawberries. Remove onions from vinegar mixture with a fork and add to the salad. Pour dressing over the salad and season with salt and pepper. Top with additional almonds.