Romaine & Mandarin Orange Salad & Dressing

Romaine & Mandarin Orange Salad & Dressing
6 slices bacon
1/3 cup apple cider vinegar
3/4 cup white sugar
1/2 red onion, coarsely chopped
1/2 teaspoon dry mustard powder
1/4 teaspoon salt
1/2 cup vegetable oil
1 teaspoon poppy seeds
10 cups torn romaine lettuce leaves
1 (10 ounce) can mandarin orange segments, drained
1/4 cup toasted slivered almonds or cashews
Cook bacon over medium high heat until evenly brown. Drain, crumble and set aside.
Place vinegar, sugar, red onion, mustard powder, and salt in a blender, and puree on high until smooth. Reduce blender speed to medium-low; slowly pour in the vegetable oil and blend until incorporated and the dressing is creamy. Stir in the poppy seeds and set aside.
To serve, toss the romaine in a large bowl with the crumbled bacon, Mandarin oranges, and enough dressing to moisten. Place onto salad plates and sprinkle with toasted almonds or cashews.