Heat a 12-inch skillet over medium heat. Add the oil, leek, and a pinch of salt; cook, stirring often, until just tender, 3 to 4 minutes. Add the mushrooms and a pinch of salt and cook until the mushrooms are lightly browned and tender, 4 to 5 minutes. Add the celery and a pinch of salt and cook until crisp-tender, 5 to 8 minutes. With a wooden spoon, stir in the lemon juice and scrape up any browned bits from the bottom of the pan. Stir in the rosemary and sage and cook until fragrant, about 1 minute. Stir in the parsley and season to taste with salt and pepper. Transfer the mixture to a bowl. Return the pan to medium heat, add the chicken broth or water, and scrape up any remaining bits. Let the liquid reduce by half and then pour over the celery. Serve immediately.
nutrition information (per serving):
Photo: Scott Phillips