Get 1 carrot, 1 onion, 1 leek, 1 potato and dice/rough chop them
Then put them in a saucepan, adding some peas and add some water that just covers the vegetables
Add a pinch of salt and pepper
Once it has boiled, simmer the vegetables for 20-25 minutes
Once it’s done drain most of the water, leaving a very small amount in the bottom
Remove the saucepan from heat
Get a cup and add a vegetable oxo cube, then fill the cup with roughly 1/3 of water and add 1 tablespoon of plain flour: you want the consistency to be not too thick and not too thin, so add more flour/water if needed(you can always add things but you can’t take them away)
Then add that to your pan with vegetables and cook on a low/medium heat for a few minutes so the flavours can infuse.
Then put the vegetables in your dish
Start cooking this at the same time you cook your vegetables
Get 4/5 potatoes and cut them into halves
Put them in a saucepan and add some water that just covers them
Remove from heat and add a nob of butter
Mash with a potato masher
Put your mash on top of the vegetables already in your dish
Get a fork and run it along the length of the pie, repeat that until you get to the end of the dish
Put in the oven at 200C and cook for 25/30 minutes