Preheat oven to 350 degrees. Coat a 1 1/2 quart casserole dish with cooking spray.
Combine raw quinoa, sea salt, onion powder and chicken broth in a medium sauce pan. Bring to a boil, then reduce heat to a simmer. Cover and cook for approximately 15 minutes, or until cooked. Remove from heat and fluff with a fork.
In a medium mixing bowl, combine eggs, milk, white pepper, garlic and 1 1/2 cups shredded cheddar cheese. When mixed, add quinoa and broccoli, toss (don't stir) until combined.
Transfer to casserole dish. Bake, uncovered, for 40 minutes.
Remove and top with remaining 1/2 cup cheddar cheese. Return to oven for 4-5 minutes or until cheese has melted.
Allow to sit for 5 minutes before serving. Garnish with scallions, if desired.
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