Cook the rissoni, carrot & peas in 1 cup of water until the rissoni is tender.
Mix the cornflour with the remaing 1/2 cup of water, add it to the pan with the tuna and parmesan and stir until thickened.
Wait until the mixture has cooled before blending & pouring into your 1L Sinchies resuable food pouches for dinner on the run!