Preheat the oven to 350°F (177°C). Lightly grease a muffin tray with olive oil, or use a silicone tray for easy removal.
Whisk together the eggs, chives, salt, and black pepper in a small bowl until well combined.
Evenly distribute the chopped spinach and smoked salmon into the muffin cups.
Pour the egg mixture over the spinach and salmon, filling each muffin cup about three-quarters full.
Sprinkle the shredded cheddar cheese over the top of each egg cup.
Bake for 20 minutes or until the eggs are fully set and lightly golden on top.
Let the egg cups cool slightly before removing them from the tray. Enjoy!
Notes
Serving: One serving equals two egg cups, around 24 grams of protein.
Leftovers: Refrigerate in an airtight container for up to 4 days.
More Flavor: Add fresh dill or capers to the muffin tins.
Batch Cook: Double the recipe to have them ready for breakfast all week!