Put 1 1/2 cups of the alfredo sauce in an Instant Pot. Stir in the broth, oregano, garlic powder, and red pepper flakes until smooth. Stir in the noodles, then set the block of frozen scallops right on top. Lock the lid onto the pot.
Option 1 Max Pressure Cooker
Press Pressure cook on Max pressure for 3 minutes with the Keep Warm setting off.
Option 2 All Pressure Cookers
Press Meat/Stew or Pressure cook (Manual) on High pressure for 4 minutes with the Keep Warm setting off.
When the machine has finished cooking, turn it off and let its pressure return to normal naturally for 1 minute. Then use the quick-release method to get rid of any residual pressure in the pot.
Unlatch the lid and open the cooker. Stir in the remaining 1/4 cup alfredo sauce. Set the lid askew over the pot and let sit for a couple of minutes so the noodles continue to absorb some of the liquid. Serve hot.
Add up to 1 cup frozen or fresh peas. Scatter them on top of the scallops in step 1 before locking on the lid.
Garnish the servings with shredded Asiago cheese, or even a finely grated aged Asiago. Or just try finely grated Parmigiano-Reggiano.
And/or garnish with stemmed and minced fresh parsley leaves.