Swiss Chard Frittata - cooking recipe

Ingredients

1 egg
10 egg whites
1/2 cup part-skim ricotta cheese, pressed through a sieve
1/2 teaspoon kosher salt
1/8 teaspoon pepper
1 teaspoon olive oil
1 1/4 cups swiss chard, sliced cross-wise into 1/2 inch thick slices and stalks chopped into 1/2 inch pieces
1/2 onion, sliced crosswise

Preparation

Preheat oven to 475 degrees F.
In a bowl whisk together first 5 ingredients (egg - pepper).
Over medium high heat heat oil in oven-proof skillet. Stir in swiss chard stalks and onion cooking until onion is tender (3-5 minutes).
Stir in the sliced leaves and cook stirring another minute or so.
Sprinkle with 1/4 teaspoon salt and add the egg mixture, stirring to distribute vegetables evenly.
Place skillet in oven and bake for 10-15 minutes or until eggs are set.