Line a large baking sheet (at least 18×13 inches) with parchment paper or lightly grease it with cooking spray.
In a large mixing bowl, whisk together the eggs and milk until well combined. Add salt and pepper to taste.
Gently fold in the diced bell peppers, chopped spinach, onions, and any additional ingredients. Mix until evenly distributed.
Pour the egg mixture onto your prepared baking sheet. Use a spatula to spread it evenly.
Top with shredded cheese.
Place the sheet in the oven and bake for about 30-35 minutes, or until the eggs are set and the top is slightly golden.
Allow it to cool for a few minutes before slicing into squares or rectangles.
Notes
This delicious Sheet Pan Egg Breakfast for a Crowd is perfect for feeding a large gathering with minimal prep time. Enjoy a versatile and tasty start to your day!