If you prefer not to use the raw egg yolk in this recipe, substitute one tablespoon of store-bought mayonnaise. The croutons are best made as close to serving time as possible. Note: Raw eggs should not be used in food prepared for pregnant women, young children, or anyone whose health is compromised.
To make croutons: Preheat oven to 400 degrees. Cut 2 hero rolls (each 3 ounces) into 3/4-inch cubes; scatter on a rimmed baking sheet. Toss with 2 tablespoons olive oil and 1 teaspoon dried oregano; season with coarse salt and ground pepper. Bake until golden, 6 to 8 minutes. Let cool before using.
Store croutons in a resealable plastic bag at room temperature; cooked chicken covered in refrigerator; washed lettuce in a large bowl with paper towels in refrigerator; and salad dressing, covered, in refrigerator.