Creamy Herbed Spinach Dip

Name: Creamy Herbed Spinach Dip
Ingredients: 10 ounces frozen chopped spinach; 1/2 cup sour cream; 1/2 cup mayonnaise; 2 tablespoons thin-sliced scallions , white parts only, from 3 medium scallions; 1 tablespoon chopped fresh dill leaves; 1/2 cup packed flat-leaf parsley leaves; 1 small clove garlic , minced or pressed through garlic press (about 1 teaspoon); 1/4 teaspoon hot pepper sauce , such as Tabasco; 1/2 teaspoon table salt; 1/4 teaspoon ground black pepper; 1/2 medium red bell pepper , diced fine (about 1/4 cup)