Easy Turkey Meatball Soup

Ingredients

• 1/4 cup olive oil, divided
• 1 (14-ounce) package frozen turkey meatballs
• 1 1/2 cups onion, chopped
• 1 1/4 cups carrots, coarsely chopped
• 3/4 cup celery, sliced
• 6 large cloves garlic, minced
• 1 1/2 teaspoons kosher salt
• 3/4 teaspoon dried crushed red pepper
• 1 (28-ounce) can whole plum tomatoes, drained and crushed
• 1 (15-ounce) can cannellini beans, drained and rinsed
• 7 cups unsalted chicken stock
• 1 (6-ounce) package baby spinach
• Parmigiano-Reggiano cheese, shaved, to taste