In a large bowl, combine the olive oil, red wine vinegar, minced garlic, Dijon mustard, lemon juice, dried oregano, sea salt, and black pepper to make the dressing.

Add the chopped romaine, radicchio, halved cherry tomatoes, chopped bell pepper, sliced Pepperoncini, diced cucumber, mini mozzarella balls, shaved Parmesan, halved black olives, matchstick salami, pickled red onions, and sliced basil to the bowl.

Toss all ingredients together until well combined.

Serve immediately or refrigerate until ready to serve.