Prebake pie crust according to package directions.

Preheat oven to 400 degrees Fahrenheit.

Puree cottage cheese in a food processor until smooth.

Add egg whites and whole eggs to the pureed cottage cheese and pulse until combined.

Set the egg mixture aside.

Heat olive oil in a skillet over medium heat.

Sauté diced onion in the skillet until softened, about 3 minutes.

Add baby spinach to the skillet and cook until wilted.

Stir diced ham, minced fresh chives, and red pepper flakes into the spinach mixture.

Transfer the spinach mixture to the prebaked pie crust and place on a baking sheet.

Pour the egg mixture into the crust.

Sprinkle shredded Fontina cheese on top.

Bake for 35-40 minutes, or until the filling is set in the center.