First, seal in that sealing ring on your pressure cooker and pour in your 8 ounces cavatappi pasta. Add enough water to cover the pasta by about an inch and salt it like you mean it. Lock the lid in place and set the valve to sealing.
Hit the pressure cooker on manual high pressure for 3 minutes. Yes, just three! You’re gonna quick release right when it’s done, so keep that valve nearby to hear the hiss of steam escaping.
Once you hear the valve hiss, turn it to quick release and let the steam out. When the steam stops and the pin drops, unlock the lid carefully. Drain your pasta, drizzle a bit of olive oil, and spread it out on a big plate or tray to cool. This avoids mushy clumps while you get your other ingredients prepped.
Whisk together your dressing in a big bowl: olive oil, lemon juice, balsamic vinegar, grated pecorino, grated garlic, salt, and pepper all mixing into a bright, flavorful sauce that tastes fresh and zingy.
Add the cooled pasta to the bowl and give it a good toss with the dressing. Then fold in your halved cherry tomatoes, mozzarella balls, sliced onion, and torn basil leaves. Let everything mingle by tossing gently so you don’t squish those juicy tomatoes.
Finally, sprinkle the shaved pecorino on top. Adjust salt and pepper if you feel like it needs a bit more kick. Garnish with extra basil leaves and get ready to dig in.