Place the top oven rack about 6” from the upper coils in the oven. Place another rack on the lowest position. Preheat the oven to Hi Broil.
Line a large baking sheet with foil or parchment for easy cleanup. No need to spray the foil.
Unroll the thighs, trim off any excess fat you do not want, and lay them on the baking sheet. Sprinkle both sides of the thighs with salt and pepper. Set aside.
Lay the zucchini halves, cut side up in a 9x13 (or larger as needed) baking dish. Sprinkle them with salt and pepper.
Place the baking pan of zucchini on the bottom rack of the oven. The heat from the broiler will par-cook the zucchini.
Place the baking sheet with the thighs on the top rack. Broil for 3 minutes, flip the chicken thighs over and broil for another 3 minutes.
Remove the baking sheet from the oven and scatter the onions around the thighs.
Place the baking sheet back under the broiler for another 3 minutes. Flip the chicken over again and stir the onions. Check the temperature of the chicken thighs. A digital thermometer is helpful here. The chicken needs to read 165 degrees F in the thickest part of the thighs. If you have reached 165, you can pull them out of the oven.
If the thighs need more cooking time, broil for another 2 to 3 minutes, or until thoroughly cooked. You should have some charring on the chicken and the onions.
Remove the chicken thighs and the zucchini from the oven.
Turn the oven temperature to 400 degrees F.
Remove the thighs from the baking sheet to a cutting board.
Scrape the onions into a large bowl. Add the Harmacy Hot Sauce and gently stir.
Thinly slice, dice, or shred the chicken thighs, then add to the bowl and gently combine.
You can taste for any seasoning that you may want to adjust, but the hot sauce is very flavorful and should be enough.
Evenly divide the chicken mixture on the zucchini, mounding as needed to use all the filling.
Evenly sprinkle the cheese over the tops.
Bake in the preheated oven for 15 to 20 minutes, or until the cheese is melted and the zucchinis are fork-tender.
Remove from the oven and sprinkle with the parsley and green onions.
Serve very warm.