A method of producing plant protein extract, which comprises treating plant protein raw materials under alkaline conditions, recovering the protein and spray drying the recovered protein, wherein protein deamidase is added before alkaline treatment or during alkaline treatment or after alkaline treatment. The obtained plant protein extract has improved solubility which can be used in the food or beverage.

The invention relates to a process for preparing a plant protein containing liquid from a defatted oleaginous plant, comprising the following steps: a) Forming a suspension of the defatted oleaginous plant in an aqueous solvent; b) Enzymatically treating the suspension obtained in step a), with the following enzymes: at least one protein glutaminase for the solubilisation in said aqueous solvent of proteins contained in the defatted oleaginous plant, at least one transglutaminase, said enzymes being used successively or simultaneously; c) Recovering the plant protein containing liquid obtained in step b). The Invention also relates to a plant protein containing liquid, obtained according to said process and a protein-rich food product, comprising the plant protein containing liquid obtained according to the above process.

The present invention relates to a vegan food composition comprising at least 5 wt % cereal and at least 10 wt % legume on a dry basis, wherein said composition comprises at least 2 wt % dietary fiber provided by cereal and legume and at least 5 wt % protein provided by any one or more of said cereal and legume, and wherein the D4,3 particle size of said composition is less than 100 microns.