Pepperoni Salad

Ingredients

• 1 medium onion, thinly sliced
• 8 ounces pepperoni, thinly sliced
• 1/4 cup crumbled bleu cheese
• 2/3 cup salad oil
• 1/3 cup cider vinegar
• salt and pepper to taste
• 10 ounced fresh spinach, washed dried and chopped
• 1/2 head iceberg lettuce, chopped