Italian Salad Dressing

A classic Italian Salad, similar to that of Olive Gardens....however, I, personally like this one better! Ingredients:
lettuce mixture
1 can of black olives, sliced in half
Red onion, sliced
Large croutons
Banana peppers
Roma tomatoes

Dressing:
1/2 cup mayonaise
1/3 cup white vinegar
1 tsp. vegetable oil
2 TBSP. corn syrup
2 TBSP. parmesan cheese
2 TBSP. romano cheese
1 clove garlic
1/2 tsp. italian seasoning
1/2 tsp. parsley flakes
1 TBSP. lemon juice
1 TBSP. sugar

Directions:
Mix the dressing ingredients in a blender until well mixed. Toss over the salad. Sprinkle with freshly grated parmesan cheese and fresh ground pepper.