Italian Dressing

This is such a nice Italian dressing, and it is very easy to make. It is made with ingredients that I always have on hand. Make it early, so you can chill it a bit before dressing your salad.
Ingredients:
½ cup olive oil
5 Tablespoons white wine vinegar
1 Tablespoon mayonnaise
1 Tablespoon sugar
1 ½ teaspoons dried oregano
1 garlic clove, finely grated
Kosher salt, freshly ground pepper
This salad dressing was originally made with a small head of iceberg lettuce. 1/2 small red onion, thinly sliced into rings. 2 ounces provolone thinly sliced. 1 cup drained mozzarella balls,10 pepperoncini sliced.