Campur mayones, krim asam, bubuk bumbu sup daun bawang, kastanye air, dan bayam cincang bersama-sama dalam mangkuk berukuran sedang. Aduk bahan bersama-sama. Dinginkan dalam lemari es. Sajikan.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Mix together 1 cup of mayonnaise, 1 container of sour cream, 1 package of dry leek soup mix, 1 can of drained and chopped water chestnuts, and 1/2 (10 oz.) package of thawed and drained frozen chopped spinach. Stir the ingredients together until they're incorporated. Chill these ingredients together for 6 hours, or even overnight. This will thicken the mixture and combine the ingredients a bit more. Serve this rich spinach dip with a sliced loaf of round sourdough bread. You can dip the bread in