Instant Pot Chicken Saltimbocca

Prepare the Chicken: Place chicken breasts on a cutting board. Butterfly each breast by slicing horizontally through the middle, being careful not to cut all the way through. Open the halves and season with salt and pepper. Sprinkle each butterflied breast with chopped sage. Top with a slice of prosciutto and fold the chicken breast closed. Dredge each chicken breast in flour to coat lightly. (Prep time: 15 minutes)

Sear the Chicken: Turn on your Instant Pot and select the 'Sauté' function. Melt butter in the pot, then add olive oil. Sear the chicken breasts until golden brown on both sides, about 3-4 minutes per side. Remove the chicken and set aside. (Cook time: 8-10 minutes)

Sauté Aromatics: Add the diced shallot and minced garlic to the Instant Pot. Cook until softened and fragrant, about 5-7 minutes, stirring occasionally. (Cook time: 5-7 minutes)

Deglaze and Create the Sauce: Pour in the chicken broth, scraping the bottom of the pot with a wooden spoon to loosen any browned bits. Bring to a simmer, then stir in lemon juice and lemon zest. Turn off the 'Sauté' function. (Prep time: 2 minutes)

Pressure Cook: Place a trivet in the Instant Pot. Arrange the seared chicken breasts on top of the trivet. Close and lock the lid. Select 'High Pressure' and set the timer for 5 minutes. Allow 10-15 minutes for the pressure to build. (Pressure build: 10-15 minutes, Cook time: 5 minutes)

Natural Pressure Release: Allow the pressure to release naturally for 15 minutes. After 15 minutes, manually release any remaining pressure according to the manufacturer's instructions. Remove the chicken and trivet from the Instant Pot and place the chicken in a baking dish. (Release time: 15 minutes)

Thicken Sauce and Finish: Select the 'Sauté' function on the Instant Pot. In a small bowl, whisk together cold water and cornstarch to create a slurry. Stir the cornstarch slurry into the sauce in the Instant Pot. Cook until the sauce has thickened, about 5 minutes, stirring constantly. Pour the sauce over the chicken breasts in the baking dish. Top each chicken breast with a slice of fresh mozzarella cheese. (Cook time: 5 minutes)

Broil (Optional): For extra browning and to melt the mozzarella, broil in the oven for about 2-3 minutes.