1.For the crockpot: place trimmed chicken in the slow cooker and whisk together soy sauce, honey, garlic, tomato paste, vinegar, hot sauce, and cornstarch; pour over chicken.
2.Cook on low for 4-5 hours (or high for 2 1/2 hours), then shred chicken and toss back in the sauce.
3.For the Instant Pot: spray insert, add chicken, whisk sauce ingredients with 1/4 cup water, pour over chicken, and cook on high pressure for 25 minutes.
4.Quick release, shred chicken, whisk cornstarch with 3 tablespoons cold water, add to pot, and sauté until thickened.
5.Garnish with green onions and sesame seeds and serve with rice and broccoli.