Zest 1 lemon into a small bowl. Slice off the top and bottom of the zested lemon and place the lemon upright on a cutting board. Using a sharp knife, thinly slice off the white pith by moving down the length of the lemon in sections. Discard the pith and roughly chop the flesh, removing any seeds you come across. Transfer the chopped lemon (about 2 tablespoons) and any juice to the bowl.
Stir in the cheese, sliced shallot rings, crushed red pepper, olive oil and chopped walnuts. Let marinate in the refrigerator as you cook the chicken.
Pat the chicken pieces dry and season the skin with the L&B Mediterranean Seasoning.
Heat the grapeseed oil in a large skillet over medium-high heat. Place the chicken pieces skin-side down and cook until golden brown, about 8 minutes. Reduce the heat as needed to prevent the spices from burning. Flip the chicken pieces and cook for another 1 to 2 minutes. Transfer the chicken to a plate and set aside.
Add the quartered shallots to the pan, and stir to coat the shallots in the pan drippings and fried spices. Lower the heat to medium and cook until golden brown and just tender, about 4 minutes. Add the couscous, and stir to coat the pearls in the fat. Add the broth, stir and bring up to a simmer.
Return the chicken to the skillet, skin-side up. Add the oregano sprigs, cover with a lid and cook until the liquid is absorbed, the couscous is tender and the chicken is cooked through, 20 to 25 minutes. Remove the pan from the heat, discard the oregano sprigs and fluff the couscous.
Top with the halloumi-walnut mixture and squeeze the juice of the remaining lemon over the entire pan. Garnish with the fresh parsley and serve.