Use two separate pots, in one add half&half and heat medium high (do not boil) add corn starch and whisk well.
Base:In the other pot all at once add water, clam juice, clam base, chardonnay, butter, Italian seasoning, pepper, potatoes, and onions. Cook at medium high until potatoes get soft and then add crab meat (or clams if crab is unavailable)
Once half&half+corn starch mixture is heated up and thickened, add base and stir. Able to serve right away
Mom's Garlic Spread
Mix all together and that's it. Spread on bread and toast or add to a steak sandwich. Mom used it for everything