Prepare the bacon: fry it over medium heat with smashed garlic cloves until browned and crispy. Transfer to a paper towel to drain excess oil.
Wipe the pan off but reserve about 1 tbsp of fat for frying the scallops later.
Boil the pasta one minute short of the cooking time. Reserve 1/2 cups cooking water.
Remove the muscle and thoroughly wash the scallops. Pat dry.
While the pasta is cooking, sear the scallops in bacon fat over medium-high heat for a minute on each side.
Return the bacon and garlic to the pan, lower the heat, add the cream and stir to combine. Add minced garlic, if using. Season with salt.
Add half the parsley and the cooked pasta, and cook, stirring, for 30-40 seconds. Check for consistency (the pasta should not be dry) and add cooking water if needed.
Sprinkle with parmesan, the remaining parsley and freshly ground black pepper.