Chop fresh clams, if using, reserving juice; set clams aside. Strain clam juice to remove bits of shell. (Or, drain canned clams, reserving juice.) If necessary, add enough water to reserved clam juice to equal 1 cup. Set juice aside.
In a large saucepan cook bacon until crisp. Remove bacon, reserving 1 tablespoon drippings in pan. Drain bacon on paper towels; crumble bacon and set aside.
Stir reserved 1 cup clam juice, potato, onion, bouillon granules, Worcestershire sauce, thyme, and pepper into saucepan. Bring to boiling; reduce heat. Simmer, covered, about 15 minutes or until potatoes are tender. With the back of a fork, mash potatoes slightly against the side of the pan.
Stir together milk, half-and-half, and flour; add to potato mixture. Cook and stir until slightly thickened and bubbly. Stir in clams. Return to boiling; reduce heat. Cook for 1 to 2 minutes more or until heated through. Sprinkle each serving with crumbled bacon.
Makes 4 servings (6 cups)
