Peel the potatoes and chop them into chunks.

Place the potatoes in a pan of water and cook over a medium heat until soft and mashable - about 20 minutes.

Get another pan of water ready on the hob and pop the eggs in. Boil them until they're hard boiled - however long this is in your kitchen.

Chop up the onion and red pepper and lightly fry them in a frying pan over a medium heat.

When the potatoes are cooked, drain them and mashed them up.

When the eggs are cooked, peel the shells off and crumble the eggs into the potatoes. Mix them in well.

When the pepper and onion are cooked, toss them into the potato mixture and mix well.

Empty in the peas and tuna and stir again. (The heat from the potatoes will cook the peas)

Tip in the yoghurt and stir well. Taste test and if it's too dry, add more yoghurt.

Leave to cool to room temperature before storing in an air-right container in the fridge.