Preheat oven to 350℉. Arrange a silicone muffin top pan on a small sheet pan for support.
Whisk eggs, egg whites, salt, and pepper together.
Divide spinach, cherry tomatoes, green onion, and cheese between muffin top cups.
Use a ladle to evenly distribute egg mixture into each cup. Sprinkle dill over each egg cup.
Bake for 15 minutes, until eggs are set.