Preheat oven to 325 F. Spray a muffin tin with cooking spray or lightly greasing with coconut oil.
In a large bowl, whisk together the eggs, egg whites, milk, garlic powder, salt and pepper.
Add the riced broccoli and roasted red pepper.
Transfer the mixture to the muffin tin, dividing evenly among 8 cavities.
Bake at 325 F for 20-22 minutes until eggs are set and firm in the center.
Remove from the oven and carefully remove the egg muffins with a small spatula. Transfer to a wire rack to cool completely.
Eat immediately, or store in the refrigerator up to 4 days.