Christmas Eve Couscous

• 1 squeeze lemon juice
• 1 courgettes
• 700 ml water
• 450 gr acorn squash
• 350 gr chick peas (canned)
• 300 gr couscous
• 250 gr broad beans salt (frozen)
• 250 gr carrots
• 230 ml soy yogurt
• 230 gr onions