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In the pressure cooking pot, stir together water, vegetable oil, 1 teaspoons salt, and pasta. Make sure the water just covers the pasta in the pot.
Place a rack in the pressure cooker above the penne.
For the marinara sauce, in a 7-inch round cake pan, stir together the tomatoes, garlic powder, basil, red pepper flakes, and remaining 1/4 teaspoon salt. Use a sling to carefully lower the pan onto the rack. Lock the lid in place. Select High Pressure and 3 minutes cook time.
When the cook time ends, turn off the pressure cooker. Use a quick pressure release. If larger water drops or foam start to emerge from the steam release valve, return the switch to the Sealed position and wait for 30 seconds or a minute, then release the pressure again. Repeat this process, as needed, until no foam comes from the steam release valve and all the pressure is released.
When the valve drops, carefully remove the lid. Remove the marinara sauce and rack from the cooking pot. If you prefer your pasta more tender, select Saute and simmer until it reaches your desired tenderness. Use a ladle or strainer to remove excess water from the pasta.
Stir in the marinara. Taste and adjust the seasoning if desired.
Serve topped with cheese.