Step 1

Cut each chicken breast apart horizontally into 2 thinner pieces. Season with salt and pepper.

Step 2

Turn Instant Pot on "Saute" mode. When hot, add butter and olive oil. When butter has melted, add garlic and onion and cook for 2 minutes. Turn Instant pot off.

Step 3

Add chicken, chicken broth. lemon juice, lemon zest, Italian seasoning, red pepper flakes, and salt.

Step 4

Place lid on Instant Pot. Make sure valve is in sealing position. Pressure Cook on HIGH for 8 minutes. Do a quick pressure release. When the pin drops, remove the lid.

Step 5

Remove chicken and set aside. Turn the Instant pot to "Saute" mode and simmer the liquid for 5 minutes to reduce it.

Step 6

Add cream. Mix cornstarch with 1 1/2 teaspoons water and mix into the liquid. Simmer for 2 minutes.

Step 7

Turn Instant Pot off and stir in cheese until melted. To serve, spoon sauce over chicken.