Wash and finely chop the romaine lettuce and radicchio into bite-sized pieces.
Dice the salami and provolone cheese into uniform 1/4-inch cubes.
Combine the lettuce, radicchio, salami, cheese, chickpeas, onion, tomatoes, pepperoncini, and cucumber in a large mixing bowl.
In a separate small bowl, whisk together the olive oil, red wine vinegar, oregano, salt, and pepper until emulsified.
Drizzle the vinaigrette over the salad ingredients.
Toss the salad thoroughly to ensure even distribution of ingredients and dressing.
Serve immediately at room temperature or slightly chilled.