1. Preheat an oven to 400 degrees F.

2. In a large mixing bowl, combine the beef, Italian seasoning, and bread crumbs. Form into equal sized meatballs. Salt & pepper to season as desired.

3. In a large frying pan, over medium heat, brown the meatballs until about 80-90% cooked through and remove from heat.

4. Add a bit of oil to the pan and fry the carrots, celery, and red onion until they are soft. Add the remaining ingredients and bring to a simmer for ~5 minutes.

5. Transfer the marinara to the blender and blend until smooth. You may need to do it in two batches, depending on the size of your blender.

6. In a large baking dish add 3/4 the sauce and mix in the chopped spinach. Add the meatballs in and spread them out evenly. If using basil paste add a few dollops throughout. Then, add in the Pillsbury biscuit dough. Separate each uncooked biscuit into 4 pieces and disperse evenly through the dish. Top with the remaining sauce and the Mozzarella cheese.

7. Bake for ~25-30 minutes until the biscuits are cooked and the cheese is golden brown.