Step 1

Squeeze all water from spinach.

Step 2

In a 9 inch non-stick sauté pan, heat olive oil over medium heat.

Step 3

Add the onion and scallions and cook until soft, about 4 minutes.

Step 4

Meanwhile in a medium bowl, beat the eggs.

Step 5

Add salt, pepper, cheeses and spinach and mix well.

Step 6

Pour the mixture into the skillet and cook until the bottom sets, about 5 minutes.

Step 7

Hold a large plate over the pan and invert the frittata onto the plate, then slide it back into the pan.

Step 8

Cook about 5 minutes longer. Serve hot.