Directions

1. Heat oven to 400° F.
2. Heat the oil in a medium nonstick ovenproof skillet over medium-high heat. Add the sausage and cook, breaking up with a wooden spoon, until golden, 3 to 5 minutes.
3. Add the zucchini, onion, and ¾ teaspoon each salt and pepper. Cook, stirring often, until the zucchini is tender, 6 to 8 minutes. Remove from heat and stir in the eggs and Cheddar.
4. Transfer the skillet to oven and cook until just set, 10 to 13 minutes.
5. Serve the frittata with salad.