Preheat oven to 375 F (190 C).
In shallow 10 x 10 x 3 in (26 x 26 x 8 cm) baking pan, arrange rhubarb in one layer. Cut ginger in 3 or 4 chunks and add to pan along with cinnamon stick and mint sprig.
In small bowl or jug, mix together orange juice, water, and honey. Pour over rhubarb mixture.
Place baking tray in preheated oven and poach for approximately 20 to 30 minutes. Rhubarb is done when it is fork tender but still retains its shape. Serve over porridge or granola, or use as a dessert topping or cake filling.
Enjoy!