Ingredients

12 slices white sandwich bread 

Melted unsalted butter, for brushing 

1/2 cup frozen chopped spinach, thawed, drained, and squeezed dry 

12 large eggs 

Kosher salt and freshly ground pepper 

Preparation

Preheat oven to 350 degrees. Using a sharp knife, cut off bread crusts. Brush both sides of bread slices with butter. Gently press one slice into each cup of a standard muffin tin. Place 1 tablespoon spinach in each bread cup, then crack an egg into each; season with salt and pepper.

Bake until whites are set and yolks are still soft, 15 to 20 minutes. Serve.