Grease a 6 quart Instant Pot with cooking spray. Set aside.
In a large bowl, whisk together broth, 1/2 cup lemon juice, soy sauce, honey, garlic, lemon zest, red pepper flakes, ground ginger, and black pepper.
Pour half into the prepared Instant Pot, place chicken breasts on top, then pour remaining sauce over chicken.
Cover and lock lid - be sure steam releasing handle is pointing toward SEALING.
Cook on HIGH pressure for 10 minutes, then flip the valve to "VENTING" for a quick release.
Remove chicken and set aside.
In a small bowl, whisk together cornstarch with 2 tablespoons lemon juice.
Whisk that mixture into the Instant Pot.
Hit SAUTE on the Instant Pot and bring the sauce to a simmer.
Add chicken back in and simmer until the sauce has thickened, about 5 minutes.
Shred or cube the chicken directly in the pot, taste and re-season, if necessary, then serve and enjoy!
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