Preheat oven to 350 degrees.
Generously coat a 12 well muffin (standard) pan with olive oil. You could use a cooking spray.
In a frying pan cook bacon strips. Set-aside to cool.
Next, sauté spinach until wilted.
Divide the bacon and spinach evenly between the 12 muffin wells.
In a medium mixing bowl, place eggs, salt, and red pepper and whisk until the eggs are completely blended.
Pour egg mixture into the muffin wells, filling each of the 3/4 full.
Top each muffin well with feta cheese.
Bake approximately 15 minutes, until the egg muffins are set and slightly brown around the edges.
Remove from oven and place on a wire rack to cool for 3-4 minutes.
Run a knife around each cup to loosen the muffin before removing them from the pan.
Serve warm with fresh fruit or salsa.