01 - Preheat oven to 350°F and generously grease a 6-cup muffin tin with olive oil or melted butter.
02 - In a mixing bowl, whisk together the eggs, milk, salt, and black pepper until thoroughly combined.
03 - Incorporate the shredded cheese, smoked salmon, chopped shallot or onion, chopped spinach, and dill into the egg mixture.
04 - Evenly distribute the mixture between the prepared muffin cups, filling each about three-quarters full.
05 - Bake for 18 to 20 minutes, until set with lightly golden tops.
06 - Allow to cool for five minutes, then run a knife along the muffin edges to release and remove them from the tin.
07 - Garnish with additional dill if using and serve warm or at room temperature.