Favorite Chopped Salad

Name: Favorite Chopped Salad
Prep time: 15 min
Total time: 15 min
Cuisine: European, Mediterranean, Italian
Ingredients: 1 recipe Homemade Italian Dressing; 1 Romaine heart (3 cups); 5 cups leafy lettuce; 1 large shallot; 1 English cucumber (2 cups chopped); 1/2 cup cherry tomatoes; 1/2 cup ripe green olives, halved; 1/2 cup jarred sliced pepperoncini; 1/4 cup Parmesan shavings or shreds, plus more to serve; 1/4 teaspoon red pepper flakes, optional