In a large bowl, combine lemon juice, Dijon mustard, red wine vinegar, sugar, dried oregano, olive oil, kosher salt, and black pepper. Whisk until well blended.

Add chopped romaine lettuce, red onion, chickpeas, cherry tomatoes, genoa salami, fresh mozzarella, pepperoncini, roasted red peppers, and basil to the bowl.

Toss the salad gently until all ingredients are evenly coated with the dressing.