Instructions

1. Preheat the oven to 450 degrees F.
2. In a large mixing bowl, whisk the eggs, cheese, ¾ cup yogurt, pepper, and salt until incorporated. Set aside.
3. Trim the cauliflower into florets; discard any tough parts of the stem. Chop the cauliflower into small pieces.
4. Set a large ovenproof skillet (preferably cast iron) over medium-high heat.
5. Add the olive oil; once it starts to shimmer, add the cauliflower, stir to coat, and let cook undisturbed for 3 to 4 minutes, or until it starts to brown.
6. Stir and cook for a few more minutes to increase the browning. Give the cauliflower one last stir and transfer the pan to the oven.
7. Roast until the it’s browned all over, 6 to 8 minutes.
8. Transfer the skillet back to the stovetop (carefully; it will be hot!) and decrease the oven to 300 degrees F. This can be done ahead, or you can just pause and wait for the oven to cool down.
9. Set the skillet over medium-high heat.
10. Pour in the egg mixture and cook undisturbed for 30 seconds to 1 minute, or until the edges are just beginning to set.
11. Return to oven and bake the frittata until the top-center is just set, 25 to 30 minutes.
12. While it bakes, zest half of the lemon and combine it with the remaining ½ cup yogurt.
13. Season frittata generously with black pepper.
14. Slice warm, directly from the skillet, or wait for the pan to cool down, set a large platter over the pan, and carefully invert it.
15. Just before serving, toss the arugula with a bit of lemon juice (2 teaspoons or so).
16. Serve slices of the Cacio e Pepe Frittata with about 1 generous tablespoon of lemony yogurt and top with the arugula salad; finish with black pepper and freshly grated Parmesan.