Italian Baked Chicken and Pastina

INGREDIENTS

• 1 clove garlic, minced
• 1 cup pastina pasta (or any small pasta)
• 1/4 cup bread crumbs
• 1/2 cup diced onion (about 1/2 a small onion)
• 2 tablespoons olive oil
• 1/4 teaspoon freshly ground black pepper
• 1/4 cup grated Parmesan
• 1 tablespoon butter, plus more for buttering the baking dish
• 1/2 cup cubed chicken breast (1-inch cubes)
• 1 (14.5-ounce) can diced tomatoes with juice
• 1/4 teaspoon kosher salt
• 1/4 cup chopped fresh flat-leaf parsley
• 1 cup shredded mozzarella