Asparagus Frittata Recipe – Sunset Magazine

Ingredients

• 2 teaspoons olive oil
• 1 small onion, thinly sliced
• 1/2 teaspoon salt
• 1 pound asparagus, tough stem ends snapped off and spears cut diagonally into 1-inch lengths
• 4 large eggs, lightly beaten
• 1 cup shredded Gruyère or Swiss cheese