Easy Egg Breakfast Casserole - Ohio Eggs

Ingredients

• 1 tablespoon avocado oil
• 1 cup chopped onion
• 1 cup chopped red bell pepper
• 1 1/2 cups chopped broccoli florets
• 12 large eggs
• 1 cup half and half or whole milk
• 1 teaspoon salt
• 1 teaspoon garlic powder
• 1 cup shredded sharp cheddar