GrainLegsGo aims at increasing the cropping of fresh grain legumes (GLs) for human consumption, while providing environmental and climate benefits and promoting circular bioeconomy. We propose to develop novel GLs-based cropping systems with harvest of fresh GLs for human consumption and early establishment of cover crops (CC), which improve the sustainability and climate impacts of GLs-based cropping systems, and allow potential biorefining of green crop residues. Such optimization of GLs cropping will reduce the reliance on external inputs and minimize negative environmental impacts, including greenhouse gases (GHGs) emissions, while providing additional ecosystem benefits. Through a co-creative and participatory approach, stakeholders will be involved to exchange knowledge related to cropping of GLs, nutritional aspects of GL consumption and environmental impacts, thus to identify innovative practices for achieving higher production and human consumption of GLs in Denmark. The participatory approach will stimulate the transformation of agriculture and food systems from animal-based food to protein-rich crops. Overall, the GrainLegsGo project will facilitate an increase in the organic area for cultivation of GLs to 14% by 2030 in Denmark. This will increase the total sale of locally produced GL products benefiting both farmers and food-value chain actors, while reducing the input of N (7204 Mg N yr-1), P (1801 Mg P yr-1), and GHG emissions (60641 Mg CO2 eq yr-1).