Italian Wedding Soup

Name: Italian Wedding Soup
Ingredients: 1 small onion (grated); 1/3 cup chopped fresh Italian parsley; 1 large egg; 1 teaspoon minced garlic; 1 teaspoon salt; 1/3 cup panko bread crumbs; 1/2 cup grated Parmesan; 8 ounces ground beef; 8 ounces ground pork; Freshly ground black pepper; 2 tablespoons good olive oil; 1 cup minced yellow onion; 1 cup diced carrots (3 carrots, cut into 1/4 inch pieces); 1 cup diced celery (3 stalks, cut into 1/4 inch pieces); 10 cups chicken stock ((homemade is wonderful)); 1 cup small pasta such as acini di pepe (or substitute tubetini, stars, orzo); 8-12 ounces baby spinach (washed and trimmed); salt and pepper (to taste)