Butternut squash soup with crispy sage and apple croutons - Pac'n'Vac

Ingredients

• 1 tbsp olive oil
• 11 large onion, chopped
• 11 garlic clove, chopped
• 11 butternut squash, about 1 kg, peeled, deseeded and chopped
• 13 tbsp Madeira or dry sherry
• 1500 gluten-free vegetable stock, plus a little extra if necessary
• 11 tsp chopped sage, plus 20 small leaves, cleaned and dried
• Sunflower oil for frying
• 11 large eating apple, peeled, cored and diced
• 1 A few pinches of golden caster sugar