01 - Preheat oven to 350°F. Grease a 6-cup muffin tin with olive oil or melted butter.
02 - In a mixing bowl, whisk eggs, milk, salt, and black pepper until thoroughly blended.
03 - Gently fold in shredded cheese, chopped smoked salmon, onion, spinach, and dill.
04 - Divide the mixture evenly among prepared muffin cups, filling each about three-quarters full.
05 - Bake for 18 to 20 minutes, or until the muffins are set and lightly golden on top.
06 - Allow muffins to cool for 5 minutes, then run a knife around the edges to loosen and remove them from the tin.
07 - Garnish with extra dill, if desired. Serve warm or at room temperature.