Turn on the broiler of your oven to high.

Heat and oil a medium sized (10 inch), oven safe nonstick or cast iron skillet on medium heat.

Whisk together egg whites and eggs.

Add in the broccoli, cheese, chives, salt and pepper and gently combine.

Pour mixture into pan and let cook until the eggs begin to pull apart from side of pan and start to set about 6-7 minutes.

Transfer pan to broiler for another 5 minutes until top of frittata is golden brown. Be sure to keep a close eye on it so it doesn't burn or dry out. The frittata should have a custard like consistency when done.

Top with additional grated cheese and chives.