Potato and mushroom forestière gratin with creamy roasted pumpkin soup
Potato and mushroom forestière gratin with creamy roasted pumpkin soup is a medium French recipe that serves 4. 620 calories per serving. Recipe by La Cuisine de Lynoucha on YouTube.
Prep: 30 min | Cook: 2 hrs | Total: 2 hrs 50 min
Cost: $18.95 total, $4.74 per serving
Ingredients
- 800 g Potatoes for gratin (Peeled and cut into very thin slices)
- 2 Onion (1 for the gratin, 1 for the soup, sliced into strips)
- 4 cuillères à soupe Olive oil
- 30 g Butter
- 300 ml Heavy cream (200 ml for the gratin, 100 ml for the soup)
- 200 ml Whole milk
- à goût Salt
- à goût Black pepper
- 1 pincée Nutmeg (Optional)
- 2 Bay leaf (1 for the gratin, 1 for the soup)
- 300 g Button mushrooms (Cleaned and sliced)
- 3 gousses Garlic (2 for the mushrooms, 1 whole head for the soup)
- 100 g Chicken bacon (Optional, adds smoky flavor)
- 1 pincée Espelette pepper (Optional)
- 1 cuillère à soupe Fresh parsley (Chopped, added at the end of cooking the mushrooms)
- 150 g Grated cheese (mix of Gruyère, Comté, Emmental) (For gratinating)
- 800 g Pumpkin (Peeled, seeded and diced)
- 0.5 cuillère à café Ground cumin
- 0.5 cuillère à café Ground turmeric
- 0.5 cuillère à café Fresh grated ginger
- 1 branche Fresh thyme
- 1 branche Fresh rosemary
- 500 ml Chicken broth (Cube or liquid)
- 100 g Boursin (soft cheese spread) (Added to the soup to make it creamy)
Instructions
Prepare all vegetables
Peel the potatoes and cut them into very thin slices using a mandoline or a knife. Slice both onions, mince the garlic, clean the mushrooms and slice them. Dice the pumpkin, remove the seeds, and prepare the thyme, rosemary and bay leaf bouquet.
Time: PT20M
Sauté the gratin onion
In a large pan, heat 2 c. à s. d olive oil with 15 g butter. Add the sliced onion and cook over medium heat until translucent (≈5 min).
Time: PT5M
Cook the potatoes with the onion
Add the potato slices to the pan, season with salt, pepper and a pinch of nutmeg if desired. Sauté for 5 min over medium heat, stirring gently.
Time: PT5M
Simmer the creamy base of the gratin
Pour 200 ml heavy cream and 200 ml milk over the potatoes, add a bay leaf, adjust seasoning and let simmer over low heat, covered, for 25 min, stirring occasionally.
Time: PT25M
Sauté the mushrooms forestière style
In another deep pan, heat 1 c. à s. d olive oil, add the crushed garlic, the mushrooms, season with salt, pepper and, if you like, a pinch of Espelette pepper. Sauté for 5 min, then add the chicken bacon and continue cooking for 10 min until the mushroom liquid has evaporated and the mixture is nicely browned.
Time: PT15M
Assemble the gratin
Pour half of the creamy potato mixture into the gratin dish, spread the mushroom sauté evenly, then top with the remaining potatoes. Generously sprinkle the grated cheese on top.
Time: PT5M
Final baking
Preheat the oven to 180°C. Bake the gratin for 25 min until the cheese is nicely browned and the gratin bubbles slightly at the edges.
Time: PT25M
Temperature: 180°C
Roast the vegetables for the soup
Arrange the pumpkin dice, onion slices and the halved garlic head on a baking sheet. Drizzle with olive oil, season with salt, pepper and sprinkle with cumin, turmeric, ginger, thyme, bay leaf and rosemary. Roast in the preheated oven at 190°C for 35 min, stirring halfway through.
Time: PT35M
Temperature: 190°C
Blend and heat the soup
Transfer the roasted vegetables to a saucepan, add the chicken broth and blend with an immersion blender until smooth. Bring to a gentle boil for 5 min.
Time: PT5M
Finish the soup
Stir in the Boursin and the remaining heavy cream, mixing until the cheese is fully melted. Heat for an additional 5 min, adjust seasoning and serve hot.
Time: PT5M
Nutrition Facts
- Calories
- 620
- Protein
- 20 g
- Carbohydrates
- 45 g
- Fat
- 30 g
- Fiber
- 5 g
Dietary info: gluten‑free, nut‑free, high-fiber
Allergens: milk, cheese, cream, poultry
Last updated: April 7, 2026






