One of my favourite vegetable dishes is
Patatas Pobres / Poor Man's Potatoes
It's simply potatoes, garlic and olive oil
Pre-heat the oven to 200C/400F/Gas Mark 6
Peel and thinly slice 3 large potatoes
Peel and crush 2-3 cloves of garlic (you can use more or less)
A cup of olive oil
Mix the oil with the garlic and in an ovenproof dish layer the thinly sliced potato with the garlic and olive oil. Pop it in the oven for about half an hour. It may need longer, just check that the potatoes are cooked through. You can also fry it but I prefer the taste when it's done in the oven. The garlic seems to stay soft and like I said I think the taste is better.
Edit: Please note: I cooked this in a large shallow ovenproof dish, if you stack the potatoes high, it will require a longer cooking time.
Also you can cook this with a lot less oil. If I'm being really good I mix a lot less oil with the garlic and use a pastry brush to get it on the potatoes.
And... I start it off without tinfoil but if it starts to brown too much I cover it with foil.
We had this with lamb chops and veg from the garden the other evening. Delicious!