01 - Set oven to 350°F and lightly grease a 6-cup muffin tin with olive oil or melted butter.
02 - In a mixing bowl, whisk the eggs together with milk, salt, and black pepper until the mixture is smooth.
03 - Fold in the shredded cheese, smoked salmon, shallot or red onion, baby spinach, and chopped dill until evenly distributed.
04 - Distribute the mixture evenly among the prepared muffin cups, filling each about three-quarters full.
05 - Place in the oven and bake for 18 to 20 minutes or until muffins are set and surface is lightly golden.
06 - Allow muffins to cool for 5 minutes, then carefully run a knife around the edges to release them from the tin.
07 - Top with additional fresh dill if desired and serve warm or at room temperature.