Turn your instant pot to high sauté mode. Once preheated, add butter and let melt. Then, add onions, season with kosher salt & stir. Pour in 2 tbsp of beef broth, seal the instant pot and switch it to high pressure cook mode for 5 minutes. Manually release the pressure. 2 tbsp unsalted butter, 3 medium yellow onions, 2 tbsp beef broth
Strain off excess liquid from the onions, then return them to the pot and turn it to high sauté mode. Sprinkle on the baking soda, and sauté for ~15 minutes, stirring every few minutes. If at any point the onions seem to be burning, deglaze with a small amount of beef broth. By the end, they should have darkened in color and be very soft and mushy.
⅛ tsp baking soda
Add in garlic, sage & thyme, stir, and let cook for 1 more minute. Then deglaze the pot with apple cider, scrapping up any browned bits at the bottom. Add in the pasta and stir.
4 garlic cloves, ½ tbsp chopped thyme, 6 sage leaves, ¼ cup apple cider, 10 oz dry pipe rigate pasta
Pour in the beef broth, making sure that the pasta is mostly submerged. The amount of liquid may vary depending on the size of your instant pot, and if you use a different pasta shape.
1 ¾ - 2 cups beef broth
Seal the instant pot and switch it to high pressure cook mode. To calculate your cook time, use this formula: (package cook time ÷ 2) - 1 minute. For example: if the package says 10 minutes, you'll cook it for 4 minutes in the instant pot (10÷2 = 5, then 5-1 = 4). Manually release the pressure.
Pour in the heavy cream & stir to combine. Then, gradually add in the gruyere, stirring until melted after each addition. Taste and add more kosher salt & black pepper as needed. Enjoy!
⅓ cup heavy cream, 4 oz freshly shredded gruyere cheese, kosher salt & black pepper