Step 1

Heat oil in a large saucepan over medium heat. Add celery, carrots and onions and cook, stirring, until starting to soften, about 2 minutes. Add mushrooms and cook, stirring, until the mushroom liquid has mostly evaporated, about 5 minutes. Add flour, pepper and salt and cook, stirring, for 2 minutes more.

Step 2

Add broth and bring to a boil, scraping up any browned bits. Cook, stirring, until slightly thickened, about 2 minutes. Stir in rice, cream, lemon juice and parsley and cook until heated through, about 2 minutes more.