In a covered 2-quart microwave-safe dish, cook bacon on high for 4 to 5 minutes or until crisp. Remove with a slotted spoon to drain; set aside. Drain clam juice into the drippings. Stir in potatoes and onion. Cover and cook on high for 8 to 10 minutes, or until potatoes are tender, stirring once or twice. Stir flour into ¼ cup of milk; add to potato mixture. Stir in salt, pepper and remaining milk. Cover and cook on medium for 6 minutes, stirring once or twice. Let stand for 3 to 5 minutes. Stir in clams and butter. Garnish with bacon and parsley. Yields 4 servings.