Recipe: Italian Wedding Soup

Name: Recipe: Italian Wedding Soup
Ingredients: 1/2 cup dry bread crumbs or panko; 3 large eggs; 1/2 cup grated Romano cheese, divided; 1/2 cup grated Parmesan cheese, divided; 1 tablespoon chopped fresh oregano (or 1 teaspoon dried oregano); 1 teaspoon salt; 1/2 teaspoons freshly ground black pepper; 3 tablespoons olive oil, divided; 1 medium yellow onion, diced; 4 cloves garlic, minced; 8 cups chicken stock; 1 bunch greens (such as escarole) trimmed and torn into bite-sized pieces (about 6 lightly packed cups)