Preheated oven to 375 degrees Fahrenheit.
In a medium bowl, whisk eggs, cream, and milk. Season lightly with salt and pepper.
Stir in gravlax, tomatoes, cream cheese, onion, and dill. Pour into the pre-baked pie shell and sprinkle with Parmesan.
Bake until just set, about 45 minutes. Let rest a few minutes before slicing.