Preheat your oven to 425°F.
In a small bowl, whisk together olive oil, lemon juice, minced garlic, salt, and pepper.
Place the chicken breast on a baking sheet lined with parchment paper. Brush both sides with the lemon-garlic mixture.
Toss the broccoli florets with a little extra olive oil, salt, and pepper on a separate baking tray.
Roast the chicken and broccoli in the oven. Bake the chicken for about 18-20 minutes or until its internal temperature reaches 165°F, and roast the broccoli for about 15 minutes until crisp-tender and lightly charred.
Meanwhile, prepare the giant couscous according to the package instructions. Usually, this involves bringing water to a boil, adding the couscous, covering, and letting it simmer for 8-10 minutes until tender.
Once everything is cooked, slice the chicken, fluff the couscous with a fork, and serve the chicken atop a bed of couscous with roasted broccoli on the side.
Garnish with a little extra lemon juice or fresh herbs as desired and enjoy your balanced meal.