Preheat oven to 350 degrees F. In a blender or food processor, add egg whites, cottage cheese, salt and pepper. Process until smooth. Set aside.
Line muffin tin with parchment paper liners or spray silicone muffin tin with cooking spray. Place it on a rimmed baking sheet and pour 3 cups cold water into the sheet.
Divide spinach and roasted red pepper evenly between 12 openings. Then pour egg white mixture into each. Top with equal amount of feta cheese and cheddar cheese.
Bake egg white bites for 23 minutes or until fully set and toothpick inserted in the center comes out clean.
Remove from the oven and let cool for 30 minutes. Liners should peel off of the bites easily and to help them pop out of silicone muffin tin, run small spatula around the edges before removing. Enjoy cold or warmed up in a microwave.
Video
Notes
Store: Refrigerate in an airtight container for up to 5 days. To reheat pop a few on a plate in the microwave and reheat for 1 – 1.5 minutes from frozen or 30 seconds for fresh.
Freeze: Cook and cool egg white bites. Pop in an airtight glass container with a lid and freeze for up to 3 months. If you want to freeze in a resealable Ziploc bag, lay egg white bites flat first and then toss deeper into the freezer with frozen egg bites.