Pasta Frittata with Broccoli Rabe

Whisk eggs, Parmesan, olive oil, 1/2 teaspoon salt, and 1/2 teaspoon pepper in large bowl until egg is even yellow color; set aside.

Heat 2 teaspoons vegetable oil in 10-inch nonstick skillet over medium heat until shimmering. Add garlic and pepper flakes and cook for 1 minute. Add broccoli rabe, 1 tablespoon water, and 1/4 teaspoon salt and toss to evenly coat. Cover skillet and cook until broccoli rabe is bright green and crisp-tender, 2 to 3 minutes. Remove skillet from heat and stir in vinegar. Transfer broccoli rabe to bowl with egg mixture and wipe out skillet.

Bring remaining 3 cups water, pasta, remaining 7 teaspoons vegetable oil, and 3/4 teaspoon salt to boil in now-empty skillet over high heat, stirring occasionally. Cook, stirring occasionally, until pasta is tender, water has evaporated, and pasta starts to sizzle in oil, 8 to 12 minutes. Reduce heat to medium and continue to cook pasta, swirling pan and scraping under edge of pasta with rubber spatula frequently (do not stir), until bottom turns golden and starts to crisp, 5 to 7 minutes.

Using spatula, push some pasta up sides of skillet so entire pan surface is covered with pasta. Pour egg mixture over pasta. Using tongs, lift up loose strands of pasta to allow egg to flow toward pan, being careful not to pull up crispy bottom crust. Cover skillet and continue to cook over medium heat until bottom crust turns golden brown and top of frittata is just set (egg below very top will still be raw), 5 to 8 minutes. Slide frittata onto large plate. Invert frittata onto second large plate and slide it browned side up back into skillet. Tuck edges of frittata into skillet with rubber spatula. Continue to cook second side of frittata until light brown, 2 to 4 minutes longer.

Remove skillet from heat and let stand for 5 minutes. Using your hand or pan lid, invert frittata onto cutting board. Cut into wedges and serve.