Make the meatballs by combining ground chicken meat, an egg, breadcrumbs, grated parmesan cheese, fresh parsley and ½ teaspoon salt and ½ teaspoon pepper in a medium bowl. Mix it up with a spoon or your hands until just combined—no need to overmix.
Use a small cookie scoop or a spoon to shape the mixture into small balls, about the size of large cherries. Roll them with your fingers and pop them on a parchment-paper-lined baking tray. Place the meatballs in the fridge until ready to cook.
Heat up some olive oil in a big Dutch oven or a heavy-bottomed pot. Toss in chopped onion, carrot, and celery, and sauté over medium heat until they're nice and softened. Add minced garlic and cook for another minute, stirring.
Pour in chicken broth, add bay leaf and sprinkle in garlic poder powder. Bring it to a boil, then lower the heat to medium-low.
Add pearl couscous and gently drop the meatballs into the soup, one by one, using a spoon. Partially cover with a lid and let it simmer for 15 minutes or until the meatballs are cooked through, and the couscous is soft.
Mix in nutritional yeast and fresh parsley. Give it a taste and season with salt and pepper as needed. Remov the bay leaf.
Serve immediately and enjoy!