Pat dry your shrimp. Add the ingredients from the seasoning section. Set aside for 15-20 minutes.
Press saute. Add 2 tbsp of olive oil and 1/2 tbsp of butter in your instant pot. Add the shrimp one by one and cook shrimp on both sides until its pink and opaque. (2 minutes each side)
Remove the shrimp and set it aside.
Add butter and olive oil. Add diced onion and saute until translucent.
Add garlic and saute until fragrant (approx 1 minute). Do not burn the garlic.
Add heavy whipping cream and spices listed above or of choice. Deglaze the pot. Make sure no bits are stuck at the bottom.
Break pasta in half and layer it in alternating directions. Criss cross. Now add the crush tomatoes. Do not mix. Close the lid. Turn the knob to sealing position.
Pressure cook for 8 minutes and then quick release.
When the pin drops, open the lid and mix the contents. Note: Pasta may look watery. The excess water will be absorbed by the pasta as it cools down.
Add parmesean cheese and parsely. Mix until the cheese melts. Then add the cooked shrimp. Mix and serve.