In the bowl of a food processor, add the flour, potatoes, eggs, and shallots. Pulse until everything is blended but the consistency of the batter is chunky. Season, to taste, with salt and pepper.
In a large skillet over medium-high heat, add a thin layer of oil. Pour about 1 tablespoon of the batter into the skillet for each pancake. Cook until lightly browned on both sides. Remove the pancakes from the pan to serving platters and allow them to cool to room temperature.
To serve, top each pancake with a small slice of smoked salmon, then about a teaspoon of Dill Creme Fraiche, then top with 1/2 teaspoon of salmon roe in the center. Garnish with chopped fresh dill and serve.
Dill Creme Fraiche:
Stir all ingredients together in a bowl and refrigerate until ready to use.