Garlicky Mashed Potatoes - cooking recipe

Ingredients

4 large Russet potatoes
4 cloves garlic
4 Tbsp. olive oil
pinch of rosemary
salt and pepper to taste

Preparation

Fill a 3-quart pan half full with water and bring to a boil. Peel potatoes, if desired.
Put potatoes, garlic and rosemary in water; return to a boil and cook until potatoes are tender, about 20 minutes.
Drain well, reserving 1/2 cup of cooking liquid.