Preheat the oven to 450°F and spray a baking sheet with nonstick cooking spray.
Spread the drained and rinsed chickpeas on paper towels and pat dry; remove any loose papery skins by rubbing gently.
Place the chickpeas in a small food processor with the applesauce, 1 teaspoon sea salt, and a pinch of pepper; pulse until very smooth, scraping the sides as needed.
Heat 2 teaspoons olive oil in a skillet over medium heat. Add 3/4 cup roughly chopped onion and cook until softened and beginning to brown, about 4 minutes. Add 1/2 tablespoon minced garlic, lower heat to medium-low, and cook, stirring, until fragrant, about 1 minute.
Add the cooked onion and garlic to the food processor and blend until fully incorporated and smooth.
Transfer the mixture to a bowl and stir in 6 tablespoons gluten-free panko and 2 tablespoons minced parsley until combined.
Use a cookie scoop or tablespoon to form 16 small meatballs (about 1 tablespoon each) and place them on the prepared baking sheet.
Spray the meatballs generously with cooking spray and bake for 14 minutes. Remove, spray again, and bake another 13–14 minutes until crispy and golden brown.
While the meatballs bake, heat 1 tablespoon olive oil in a large, high-sided pan over medium heat. Add 1/2 cup diced onion and 1 tablespoon minced garlic and cook until the onion is golden and soft, about 3–4 minutes.
Add the 18.3-ounce jar of diced tomatoes, 2 tablespoons tomato paste, 1 tablespoon Italian seasoning, 3/4 teaspoon sea salt, and a pinch of pepper. Bring to a brief boil, stirring constantly for 1 minute.
Reduce heat to medium-low, cover, and simmer for 10 minutes, stirring occasionally. Uncover and cook 2–3 more minutes until the sauce thickens slightly. Stir in 2 tablespoons minced parsley.
Add the baked chickpea meatballs to the sauce, gently stir to coat, and heat through. Serve over zoodles, spaghetti squash, or your choice of noodles.
Devour.