Place the cottage cheese, lemon juice, Dijon mustard, minced garlic, and anchovy fillets into a high-speed blender or food processor.
Blend on high speed for approximately 45 to 60 seconds until the mixture is completely smooth and no cottage cheese curds remain.
Add the grated Parmesan cheese, Worcestershire sauce, and black pepper to the blender.
Pulse the blender 3 to 5 times until the seasonings are well incorporated but the texture remains emulsified.
Assess the viscosity; if the dressing is too thick, add water 1 tablespoon at a time and pulse until the desired consistency is achieved.
Transfer the dressing to an airtight container and refrigerate for at least 30 minutes to allow the flavors to meld before serving.