| Preparation | Cooking | Start to finish | 
|---|---|---|
| 40 min. | 40 min. | 1 hour 20 min. | 
| 1 | Place a 24 cm (10-inch) diameter tart ring on a sheet of baking paper in a baking tray. Spread 300 g sweetcrust pastry (pâte sablée), then line the tin, and place in the fridge to set aside. |  | 
| 2 | Wash 400 g rhubarb, then dry, and trim and discard the ends. |  | 
| 3 | Cut the rhubarb into small 1 to 2 cm (0.8-inch) pieces. |  | 
| 4 | If the pieces are thick, cut them into 2. Set aside. Preheat oven to 200°C (390°F). |  | 
| 5 | Spread 300 g rich hazelnut buttercream in the pastry base. |  | 
| 6 | Scatter the rhubarb pieces over the surface. |  | 
| 7 | Bake at 200°C (390°F) for 30 to 40 minutes. |  | 
| 8 | Leave to cool slightly, before unmolding and placing on a wire rack or serving dish. Serve cold or warm. |  | 
