Spinach Mandarin Poppy Seed Salad

While I was going to school, I had a salad very similar to this at various activities because the school's catering service makes it. I adapted a recipe I found from Our Best Bites to come up with this great salad.
6-8 oz. bag of baby spinach

1 bag Romaine lettuce, chopped

1/4 thinly sliced small red onion

8 oz. mozzarella, freshly shredded

8-10 oz. Hormel Real Crumbled Bacon (found at most grocery stores and big bags found at Sam's Club.)

1 large can Mandarin oranges, drained

3/4 c. candied walnuts

poppy seed dressing to taste

Combine all ingredients except dressing in a large bowl. When ready to serve, toss with desired amount of salad dressing and serve immediately. If you anticipate leftovers, just let your eaters dress their own salads because the dressing will make the salad wilt.

Poppy Seed Dressing

1/3 c. white vinegar

1 t. Kosher salt

A few turns of freshly ground black pepper

3/4 c. sugar

1 t. mustard

1 green onion, both ends removed

1/2 c. vegetable oil

1 t. poppy seeds

In a blender, combine vinegar, salt, pepper, sugar, and mustard. While the blender is running, add the green onion, Continue running the blender and add the oil. Whisk in the poppy seeds. Serve over salad.