This soup is intentionally easy to prepare. You'll be amazed at how a few minutes of prep can lead to a culinary masterpiece. Let’s dive into the steps.

Start by assembling all the ingredients. This ensures you won't scramble later while your broth is bubbling away!

Finely dice the yellow onion, slice the celery, and thinly cut the carrots. The aroma that wafts through your kitchen as you chop will instantly heighten your excitement about this dish. The blend of these vegetables will add not just flavor but also texture.

In your slow cooker, layer the diced onions, carrots, and celery. These will become the aromatic base. Then, add the frozen meatballs. You don’t need to thaw them—they’ll cook perfectly as the soup slowly simmers.

Pour in the reduced-sodium beef broth as well as the water. This will serve as the soup's heart, so use a good quality broth. If you like, pour in the dry red wine for an extra kick. Wine adds depth, making the flavors more complex.

Now, add the diced tomatoes, Italian herb blend, minced garlic, ground black pepper, and balsamic vinegar. These ingredients dance together in perfect harmony, enhancing the overall taste of the soup.

Cover your slow cooker and set it on low for 6 to 8 hours. If you’re in a rush, high for 3 to 4 hours works too. However, the longer it simmers, the better the flavors marry.

About 20 minutes before serving, cook the ditalini pasta separately in salted boiling water until al dente. Once it's cooked, drain it and set it aside. This step ensures your pasta remains perfectly textured.

Just before serving, stir in the fresh baby spinach. It wilts beautifully and gives your soup a pop of color and nutrients. Finally, mix in the drained pasta.

Ladle the soup into bowls and finish with a sprinkle of freshly grated Parmesan cheese if desired. The world needs more cheese!