Combine all the ingredients through the chopped pepperoncini in a large bowl.
Combine the olive oil, red wine vinegar, oregano, mustard, and salt in a small lidded jar.
Place the lid on the jar and shake to combine.
Pour dressing over salad, and toss completely to combine.
Enjoy immediately or store in containers in the refrigerator to enjoy throughout the week. As this sits, it gets better! Enjoy within one week.
