Instant Pot® Spaghetti and Meat Sauce

Turn on a multi-functional pressure cooker (such as Instant Pot®) and select Saute function. Add the onion and olive oil. Cook and stir until onion is slightly soft, about 5 minutes. Add beef, Italian seasoning, pepper flakes, garlic, salt, garlic powder, and black pepper. Cook and stir until beef is browned and crumbly, 5 to 7 minutes. Hit Cancel. Add 1/4 cup water to deglaze the bottom of the pot.

Layer the spaghetti strands on top of meat in a criss-cross pattern. Pour marinara sauce over pasta. Pour diced tomatoes over sauce. Pour remaining 3 cups water around sides and on top of tomatoes. Push down lightly with the spatula to make sure water gets through layers and all pasta is covered. Close and lock the lid.

Select high pressure according to manufacturer's instructions; set timer for 5 minutes. Allow 10 to 15 minutes for pressure to build.

Release pressure using the natural-release method according to manufacturer's instructions for 5 minutes. Release remaining pressure carefully using the quick-release method, about 5 minutes. Unlock and remove the lid. Stir spaghetti and meat sauce together well before serving.