Place the milk, rice & sugar in a heavy bottomed pot on medium heat & bring to a simmer. Cook 45-55 minutes on medium low, stirring occasionally so bottom doesn’t scorch, until it reduces by about half.
When thickened, remove from the heat, let it cool. Pour into a bowl or 4-6 individual custard cups you will serve from. Pudding can be served warm or cover & refrigerate.
Rhubarb Compote
Add rhubarb, sugar & ginger to a small pot. Over medium heat, cover & bring to a simmer. Cook 5 minutes at a simmer until rhubarb has softened but still keeps its shape. Set aside to cool.
Crumble
Preheat oven to 375 F.
In a bowl mix all the ingredients & bring it together with your fingers or a fork. When fully mixed, spread it on a lined baking sheet & bake for 15-20 minutes, until browned & crispy. Remove & cool.
Serving
Spoon a generous portion of the rhubarb compote on top of the pudding, followed by a generous portion of the crumble mixture.