Broccolini Ricotta Frittata

2 tablespoons vegetable oil

1 onion, diced 

8 ounces broccolini, cut into 1-inch pieces 

9 eggs, beaten 

3/4 cup ricotta 

1/2 cup shredded Swiss cheese

Salt and pepper

Heat oven to 325°F. 

In an ovenproof skillet, heat oil until hot. Add onion and cook, stirring, until translucent. Add broccolini and cook, tossing with the onions until bright green. Season lightly with salt and pepper. 

In a mixing bowl, whisk together eggs and ricotta. Season with salt and pepper. 

Pour egg mixture over broccolini and let cook until edges are set, about 2 minutes. Sprinkle with shredded cheese and transfer to the oven. Bake until eggs are set, 25 to 30 minutes.

Let stand 10 minutes before slicing into wedges to serve.