Sweet Potato Mash with Oven Roasted Rosemary Garlic

I have already created a post about mash but this was slightly different, very simple and tasty as. Use different herbs, even a little curry paste rubbed on, use more or less potato/sweet potato, use more or less garlic. Whatever. Roasted garlic is much much milder in taste so don't be afraid of it.

2 garlic cloves
A few rosemary leaves
Olive oil
1 medium sweet potato diced
3 medium potatoes diced
1 tbs Greek yoghurt
2 tbs grated Parmesan cheese
1 tbs butter
Salt and pepper
Milk (if necessary)

Coat the garlic in olive oil and rosemary leaves. Place on some baking paper on a tray then roast in the oven for about 20 minutes. Boil the potato and sweet potato until tender. Remove the skin from the garlic. Drain the water, allow the steam to escape for a bit, add the butter, garlic, rosemary leaves, cheese and then mash. Add the remaining ingredients and check the seasoning. If the consistency is not quite right, add some milk. Thrashing about in the mash with a fork for a minute or so will give you a fluffier texture.