Butternut and Kale Risotto

Ingredients: 2tbsp olive oil ½ while onion, sliced 1 clove garlic, crushed 1 small butternut squash, peeled and cubed ½ lemon juiced 600 ml /1 pint 2 fl oz /2 ½ cups vegetable stock 200 g /7 oz/ 1 cup Arborio rice 100 ml /3 ½ fl oz/ ½ cup white cooking wine a handful