Sauté the Vegetables
Add onion, garlic, carrots, and celery to the pot. Sauté 5–8 minutes until softened and fragrant.
Stir in Italian seasoning, red pepper flakes, salt, and black pepper.
Build the Soup
Pour in chicken stock and lemon juice. Bring to a gentle simmer.
Add cooked meatballs and kale. Simmer for 3–5 minutes, until thegreens are tender.
Finish with Egg
Remove pot from heat. Slowly drizzle the whisked egg into the soup in a circular motion while stirring gently with a fork to create ribbons.
Season & Serve
Taste and adjust seasoning with sea salt and black pepper. Serve hot.