In a medium pot over high heat, heat the olive oil.
Add the minced onion and celery and cook for 2-3 minutes or until translucent. Season with a sprinkle of salt.
Add the chicken stock and bring to the boil.
Add the bay leaf and the lentils into the pot along with a pinch of salt.
Turn the heat down to maintain a simmer. Simmer until cooked through, about 20 minutes. Once cooked, turn the heat off and cover.
Place the sablefish filets onto a sheet tray and rub with olive oil.
Transfer the tray to the oven and cook for 10-12 minutes or until the sablefish begins to flake.
To plate: Place a small mound of lentils at the bottom of a plate. Top with the sablefish filets. Sprinkle a few drops of lemon juice on top and add one final pinch of salt to finish. Enjoy!