In a saucepan, combine all of your sauce ingredients, whisk until well combined.
Place your saucepan over medium-low heat.
Whisking constantly, bring to a simmer.
Reduce heat to low and let it cook until sauce is thick and bubbly.
Remove from the heat and allow your sauce to cool at room temperature.
Preheat your oven to 400 degrees f. and line a large sheet pan with parchment paper.
Cut the chicken and bell pepper into 1-inch cubes; broccoli florets into small bite-size pieces.
Season chicken lightly with sea salt and pepper.
Drizzle HALF of your prepared sauce on top of chicken pieces, toss until well coated.
Place coated chicken onto your prepared baking sheet, in a single layer.
Bake for 8 minutes, flipping halfway through, to ensure even browning.
While your chicken is cooking, combine broccoli, bell pepper, and cashews in a bowl.
Season lightly sea salt and pepper, drizzle the remaining sauce on top and toss well.
Next, carefully remove your sheet pan from the oven and add veggies around the chicken as shown.
Place sheet pan back into the oven and bake for additional 10-12 minutes until chicken is cooked through and veggies are nice golden brown.
Once done, transfer to serving bowls.
Garnish with toasted sesame seeds and chopped green onions.
Serve and enjoy!