In a 6-quart Instant Pot, add the frozen cooked ground beef.
Next, take the uncooked spaghetti noodles and break them in half. Lay a thin layer of noodles down in one direction, then go in a different direction, then switch again until all your noodles have been placed. By the time you are done, this will create a criss-cross pattern of chaos, which will help prevent the noodles from clumping.
Pour the spaghetti sauce over the noodles.
Pour the water around the edges of the pot. DO NOT STIR.
Secure the lid of the Instant Pot, making sure the sealing ring is set, and set the valve to sealing. Select high pressure/manual and dial up or down to 7 minute cook time. The Instant Pot will start on its own.
When the cooking time is finished, quick release the pressure. Remove the lid. Stir the noodles and sauce together. The sauce may seem thin at first; let the spaghetti rest for 4-5 minutes before serving so it thickens up a bit. Serve with favorite toppings.
Notes
Note 1: For the quickest spaghetti, use meal-prepped frozen ground beef. Otherwise, saute ground beef in the saute mode, making sure there are no stuck-on brown bits. Note 2: If needed, use gluten free spaghetti noodles. We love the Barilla brand, which is a corn rice-based noodles, they works great! Note 3: For low FODMAP option, use a sensitive jarred sauce like Prego sensitive sauce or a homemade low FODMAP sauce option. Selected ingredients are based on current serving sizes measured by the Monash FODMAP App at the time of publishing. As always, follow your gut and modify as needed.