Cheese Onion Soup

Simple as the title states, a winter warmer from my brother's university book. It looks so so so easy, and tastes so so so so GOOD!

• Ready In: 20 mins
• Serves: 2
• Yields: 2 Bowlfuls

Ingredients

• 1  onion, chopped
• 4  ounces cheddar cheese
• 1⁄2 tablespoon mustard
• 550  ml milk
• 1  tablespoon plain flour
•  butter

Directions

1. Cook the onion in a pan with a small bit of butter until soft. Stir in the flour to create almost a roux for a minute or so.
2. Stir in the milk, a little at a time, and then bring up to boiling point. Add the remaining ingredients and wait until the cheese has hit melting point. Taste and season accordingly, serve warm with bread.
3. (I only need to add pepper).