If you are making homemade marinara, prepare ahead of time. Heat oil on medium heat, sauté onions and garlic until tender. Deglaze with red wine if using. Stir to combine and add diced tomatoes. Cook for a couple of minutes to soften, then season with salt and pepper. Quickly add the tomato sauce. Stir in Italian seasoning until well combined. Let it come to a slow boil. Then reduce heat to low and cook for 2-3 hours.
Preheat the oven to 400 degrees F. Line a baking sheet with a wire baking rack, set aside.
Season chicken tenders with salt, pepper, and granulated garlic.
Spread the flour on a large plate, I used a dinner plate.
In a small or medium bowl, beat eggs.
In a medium mixing bowl mix together panko, grated Parmesan cheese, and parsley.
Dredge each tenderloin one at a time in the flour, and then into the beaten eggs until fully coated, then into the panko, pressing the chicken into the panko so that it sticks.
Place on the rack on the baking sheet. Once all the tenderloins are coated, brush the chicken sticks lightly with the melted butter and set in the oven.
Bake until golden brown and fully cooked, about 20 minutes. Remove pan from oven and sprinkle with mozzarella and parmesan cheese, set back in the oven and bake another 3-5 minutes until the cheese is melted and bubbly.
Remove from oven, and skewer each piece of chicken. Set on a plate to serve along with marinara sauce.