Healthy Baked Egg Muffins

Ingredients (for 8 servings)

• 6 whole — eggs
• 1 cup — egg whites
• ½ tsp — sea salt
• ½ tsp — ground pepper
• 1 tsp — olive oil
• ½ whole — orange bell pepper
• ½ cup — yellow onion
• 1 cup — broccoli
• 1 cup — mushrooms
• ⅓ cup — crumbled feta
• 2 tbsp — fresh parsley
• 1 whole — cooking spray