Heat the olive oil in a large saucepan over medium heat.
Add the onion and garlic and cook until the onion is see-through.
Add the salt and pepper.
Pour in the stock and add the bay leaf.
Bring to a simmer.
Add the cauliflower rice and the chicken.
Simmer for 10 minutes, until the cauliflower rice is just cooked and the soup is steaming hot.
Add the egg and lemon
Whisk the egg and lemon juice together in a medium bowl.
Ladle in about 1 cup of the hot broth, a little at a time, whisking as you pour.
Slowly whisk the egg mixture back into the saucepan.
Remove the bay leaf.
Taste, and add more seasoning if needed.
Serve
Top with parsley or spring onion if you like.
Notes
Cool within 2 hours, then keep in the fridge at 5°C or below and eat within 3 days. Freezes for up to 3 months: thaw in the fridge, use within 24 hours and don't refreeze. Reheat on low until steaming hot all the way through, once only. Frozen chopped onion and jarred garlic skip the chopping.