Slice the zucchinis in half lengthwise and use a spoon to scoop out the center, creating boats. Reserve the scooped-out flesh for later use if desired.
In a mixing bowl, combine shredded chicken, Alfredo sauce, minced garlic, Italian seasoning, and half of the mozzarella cheese. Mix until well incorporated. Season with salt and pepper to taste.
Spoon the chicken Alfredo mixture into each zucchini boat, filling them generously.
Place the stuffed zucchini boats on a baking sheet lined with parchment paper.
Sprinkle the remaining mozzarella cheese and grated Parmesan cheese evenly over the top of the zucchini boats.
Bake in the preheated oven for about 25-30 minutes, or until the zucchinis are tender and the cheese is melted and golden brown.
Remove from the oven and let cool for a few minutes. Garnish with freshly chopped parsley before serving.
Notes
Feel free to use leftover chicken for a quicker preparation.