Roast cauliflower cheese pie - Multix

Ingredients

• 1 large cauliflower cut in large florettes
• 1 tablespoon olive oil
• 2 cups grated vintage or tasty Cheddar
• 2 sheets frozen short crust pastry
• 1 tablespoon whole grain mustard
• 5 large spring onions finely sliced
• 2 tablespoons plain flour
• 1 cup milk
• ½ cup vegetable or chicken stock
• 75g butter
• Tabasco (optional)
• sea salt and pepper