Herbed Egg Salad Sandwiches
["4 hard-boiled large eggs, peeled and chopped", "2 Tbsp. mayonnaise", "2 Tbsp. sour cream", "2 Tbsp. minced fresh herbs (such as parsley, chives and/or tarragon)", "1 scallion, minced", "2 tsp. fresh lemon juice or to taste", "1 tsp. Dijon mustard", "a pinch of freshly grated lemon zest", "8 slices whole grain bread"]
["In a bowl, stir together all ingredients except bread.", "Season with salt and pepper to taste and combine well.", "Assemble sandwiches and serve."]
["eggs", "mayonnaise", "sour cream", "fresh herbs", "scallion", "lemon juice", "mustard", "lemon zest", "bread"]