01 - Heat oven to 350°F. Grease a 6-cup muffin tin with olive oil or melted butter.
02 - Whisk eggs, milk or cream, salt, and black pepper in a mixing bowl until blended.
03 - Fold in cheese, smoked salmon, red onion or shallot, chopped spinach, and dill.
04 - Divide the egg mixture evenly among muffin cups, filling each to three-quarters full.
05 - Place in oven and bake for 18 to 20 minutes, until set and light golden on top.
06 - Allow to cool 5 minutes, then run a knife around the edges to loosen and remove.
07 - Top with additional chopped dill if desired. Serve warm or at room temperature.