Spinach Salad with Poppy Seed Dressing

½ cup creamy salad dressing (e.g. Miracle Whip®)

⅓ cup white vinegar

⅓ cup white sugar

1 teaspoon poppy seeds

4 cups baby spinach

4 cups mixed salad greens

1 (10 ounce) can mandarin oranges, drained

⅓ cup thinly sliced red onion

½ cup slivered almonds

Make the poppy seed dressing by whisking together the creamy salad dressing, vinegar, sugar, and poppy seeds; set aside. Arrange the spinach leaves, mixed salad greens, oranges, onion, and almonds onto individual salad plates. Drizzle with poppy seed dressing to serve.