Bring a pot of salted water to a boil. Cook the ditalini pasta al dente according to the package instructions. Drain and set aside.
Heat the olive oil in a large pot over medium-low heat. Add the sliced leeks and sauté for 4–6 minutes, until softened. Add the celery and red pepper flakes, cooking for another 2 minutes until the vegetables are tender-crisp.
Pour in the chicken stock and water. Bring to a gentle simmer.
Stir in the peas, butter beans, and chopped kale. Simmer for 4–6 minutes, or until the kale is tender.
Stir in the grated garlic and cooked ditalini pasta. Let the soup cook for 1–2 minutes to combine the flavors. Taste and adjust with salt and freshly ground black pepper as needed.
Ladle the soup into bowls and serve warm. If desired, garnish with Parmesan cheese, a dollop of pesto, a squeeze of lemon, or a sprinkle of fresh dill.
Notes
Cook Pasta Separately: Cooking pasta on its own prevents the broth from becoming starchy or gummy.Mind the Heat: Avoid high heat when cooking leeks and celery—they should soften gently without browning to maintain their tenderness.Simmer Gently: Once you’ve added the butter beans, keep the soup at a gentle simmer to avoid overcooking and turning the beans mushy.Taste for Salt: Broths vary in saltiness, so taste the soup before serving and adjust seasoning as needed.Brighten the Flavor: Add a squeeze of lemon or a dollop of pesto to each bowl for a fresh, vibrant finish.
All nutritional information provided is an estimate. For specific dietary needs or concerns, we recommend consulting a nutrition calculator or a qualified expert.