We don't have as much rhubarb as I expected. I'm making a crumble and don't want to deviate as this would cause crumble deprivation sadness in the family. Would you boost it with apples, oranges or tinned peaches? I love apple crumble as much as rhubarb crumble but feel the rhubarb may 'kill' the apple flavour. I like rhub and orange stewed, but can you crumble citrus fruit? Oh the dilemma. TIA.