Preheat the oven to 325℉. If using a metal muffin tin, spray well with cooking spray. If using a silicone muffin tin, no need to grease or spray.
Combine eggs, cottage cheese, egg whites*, shredded cheese, chia seeds, and a pinch of black pepper in a blender or large bowl. Blend in a blender or use an immersion blender in a bowl until the mixture is smooth.
Add the red pepper, broccoli, and diced sausage to the mixture and stir to combine.
Pour egg mixture into the muffin wells, filling each about ¾ of the way full.
Bake egg bites for 30 to 35 minutes, or until the tops are fully set. Let them sit in the muffin tin for a few minutes before removing and serving, or let them cool and store for a meal-prep breakfast.