In a medium bowl, whisk together the soy sauce, honey, brown sugar, orange juice, orange zest, Kikkoman Sesame Oil, ginger, garlic, rice vinegar, and crushed red pepper flakes, if using. Set aside.
In a large bowl, toss the pork cubes with cornstarch, garlic powder, onion powder, kosher salt, and black pepper until evenly coated.
Heat a large skillet over medium-high heat. Add enough olive oil to generously coat the bottom of the pan, about ¼ inch.
Working in batches so you don't overcrowd the skillet, add the coated pork. Cook, turning occasionally, until deeply golden and cooked through, about 6–8 minutes, depending on the size of the pieces.
Pork should reach an internal temperature of 145°F.
Transfer the crispy pork to a paper towel-lined plate and repeat with the remaining pork, adding more oil as needed.
Carefully remove the excess oil from the skillet, leaving about 1 tablespoon behind. Reduce the heat to medium.
Add the vegetables cook for about 2-3 minutes, stirring occasionally until the vegetables are tender-crisp.
Give the sauce a quick stir, then pour it into the skillet with the vegetables. Bring to a gentle simmer.
In a small bowl, whisk together the cornstarch and water to make a slurry.
Slowly stir the slurry into the simmering sauce. Cook for 1–2 minutes, stirring frequently, until the sauce thickens and becomes glossy enough to coat the back of a spoon.
Add the crispy pork back to the skillet and gently toss with the sauce and vegetables for 30–60 seconds, just until coated.
Don't simmer the pork in the sauce for too long, or you'll lose some of its crispy texture.
Serve immediately over cooked white or jasmine rice and garnish with scallions and sesame seeds.