Cauliflower soup with cheese and bacon toasts

Ingredients

• 1 tablespoon olive oil
• 1 brown onion (150g), chopped coarsely
• 2 clove garlic, crushed
• 1 potato (300g), chopped finely
• 1 kilogram cauliflower, trimmed, chopped coarsely
• 3 cup (750ml) chicken stock
• 3 cup (750ml) water
• 2 tablespoon coarsely chopped fresh chives
• 3 thin bacon rashers (210g), quartered
• 1 thin crusty italian-style bread
• 1 tablespoon wholegrain mustard
• 120 gram thinly sliced cheddar cheese