Over medium heat, add olive oil, onion, celery, carrots and sea salt.
Saute 5-7 minutes.
Add garlic and oregano. Saute another minute.
Add red lentils, chickpeas, water and bay leaf.
Bring to boil and then reduce heat to medium low. Allow to simmer 15-20 minutes.
Stir in spinach at the end. Allow to wilt (about 5 minutes).
Remove from heat. Stir in lemon juice.
Add salt and pepper to taste.