Cod in a White Sauce with Mashed Potato and Peas

Peel the potato, cut it into chunks and boil for 15 minutes. Add the peas for the last 3 minutes. Drain and mash the potato with a third of the butter and a splash of the milk.

• 1 potato
• 2 tbsp frozen peas
• 5g unsalted butter

Put the cod in a small pan with the milk and simmer gently for 5 to 6 minutes, until it flakes easily.

• 1 frozen boneless cod fillet
• 150ml whole milk

Lift out the fish, flake it and check carefully for bones. Keep the milk.

Melt the rest of the butter in a clean pan, stir in the flour and cook for 1 minute.

• 10g unsalted butter
• 1 tbsp plain flour

Whisk in the warm milk a little at a time until the sauce thickens, then stir in the cheddar.

• 15g mature cheddar

Fold the fish into the sauce and serve with the mash and peas.