FrenchMedium · Hot
Gratin de Chou-Fleur au Pesto de Graines de Tournesol
A comforting French-style cauliflower gratin elevated with a vibrant sunflower seed pesto. Creamy, dairy-free, and allergen-friendly without sacrificing flavor or texture.
Prep
15 min
Cook
50 min
Rest
5 min
Total
1h 10m
Method
Prepare and Roast Cauliflower
1
Toss the cauliflower florets with 2 tbsp olive oil, 0.5 tsp salt, and 0.25 tsp black pepper until evenly coated.
2
Spread the florets in a single layer on a baking sheet. Roast for 20 minutes until the edges begin to caramelize and the cauliflower is just tender. Remove and set aside.
Make Sunflower Seed Pesto
3
Blend on high until the pesto reaches a smooth, vibrant green consistency. Taste and adjust seasoning if needed. Set aside.
Prepare Dairy-Free White Sauce
4
Season with 0.5 tsp salt, 0.25 tsp black pepper, and 0.25 tsp nutmeg. Remove from heat and set aside.
Assemble and Bake the Gratin
5
Transfer the mixture to the prepared baking dish, spreading it out in an even layer.
6
In a small bowl, mix the breadcrumbs with 2 tbsp olive oil and 0.25 tsp salt. Sprinkle this topping evenly over the cauliflower mixture.
7
Remove from the oven and let rest for 5 minutes before serving. This allows the sauce to set slightly and makes portioning easier. Enjoy warm as a satisfying main course or side dish.
A
Nutri-Score
Excellent balance
A–E · lower is better · score -1
Calories
650
per serving
Low sugar · 7g
Protein
13g
Carbs
41g
Fat
52g
Sat. fat
7g
Fiber
9g
Sugar
7g
Sodium
1191mg
Heart HealthyAnti InflammatoryDiabetes FriendlyLow GlycemicHigh FiberBalanced MacrosWhole FoodsPlant Forward
Nutri-Score is a general nutritional-balance guide, not medical or dietary advice.
B
Environmental impact
Low impact
A–E · lower is better · includes estimates
kg CO2e
0.4
per serving
BCarbonAEU all-round· carbon sets the grade
Water
1.3m³
Land
48Pt
Runoff
0.09g P
Cauliflower drives 31% of this recipe’s estimated footprint.
Carbon from Poore & Nemecek 2018; water, land & runoff from Agribalyse — modelled averages for comparing recipes, not a measurement of your groceries.
Flavor Profile
6
Umami
4
Sweet
5
Salty
3
Sour
2
Bitter
4
Spicy
Textures
CreamyTenderCrispy
Aromas
HerbalNuttyEarthy
Kitchen Equipment
Primary Tool
Baking SheetSheet PanSaucepanBlenderChef KnifeCutting BoardMixing BowlWhiskMeasuring SpoonsMeasuring CupsSpatulaParchment PaperSilicon Mat
Counter FootprintMedium
Techniques
Safety & Storage
Cross Contamination
Use dedicated gluten-free equipment and workspaces when preparing this dish for individuals with celiac disease or wheat allergies. Clean all utensils, cutting boards, and surfaces thoroughly before handling the cauliflower or pesto.
Cooking Temperature
Roast cauliflower at 400°F (200°C) until edges caramelize and florets reach tender texture. Ensure the gratin bakes at the same temperature until the topping is golden and crispy.
Storage
Refrigerate the completed gratin within 2 hours of cooking. Store in an airtight container and consume within 3-4 days. Reheat thoroughly until steaming hot before serving.
Allergen Warning
This recipe contains wheat/gluten from breadcrumbs and sunflower seeds. Sunflower seeds, while not among the top 14 allergens, can cause allergic reactions in sensitive individuals. Always verify all ingredient labels for hidden allergens.
Handling
When blending the sunflower seed pesto at high speed, ensure the lid is securely fastened to prevent splattering. Allow the blender to cool slightly between uses if making multiple batches.
High Risk Population
For immunocompromised individuals, elderly, pregnant individuals, or young children, ensure all ingredients are fresh, properly washed, and the dish is cooked to safe temperatures throughout.
Pro Tips
Technique
For the most even caramelization, spread your cauliflower florets in a single layer with space between each piece. Overcrowding leads to steaming instead of roasting, and we want those beautiful golden edges that make this gratin sing.
Substitution
If sunflower seeds aren't available, pepitas (green pumpkin seeds) work beautifully here — just toast them lightly first to bring out their natural nutty depth. Always verify your seeds are processed in a dedicated allergen-free facility.
Time Saver
Prep the pesto up to three days ahead and store it in an airtight container with a thin layer of olive oil on top to preserve that vibrant green color. The white sauce comes together in minutes when you're ready to assemble.
Make Ahead
This gratin assembles beautifully the night before — just prep everything, top with breadcrumbs, cover, and refrigerate. When you're ready to serve, add 10 extra minutes to the bake time since you're starting cold.
From the chef
Cauliflower roasted until caramelized at the edges sits at the center of this gratin, coated in a dairy-free bechamel thickened with cornstarch and seasoned with a careful pinch of nutmeg. The sunflower seed pesto — blended with fresh basil, garlic, and lemon — runs through the dish like a bright green seam, cutting through the richness. A golden breadcrumb topping finishes it with crunch. Every layer is accounted for, every ingredient named. This is what allergen-free French cooking looks like when it refuses to apologize for itself.
TagsDairy FreeAllergen FriendlyVegetarianBakedComfortfoodFrench CuisineGluten FreeCauliflowerPesto
AllergensGlutenWheat
Source: generated · June 10, 2026