Fill a large saucepan with water and place over high heat. Season generously with salt.
Once the water is boiling, add potatoes and rosemary.
Reduce heat to medium-high and cook for about 10-12 minutes or until the potatoes are tender but not mushy.
Drain. Discard rosemary.
Mash potatoes.
Press the mash through a fine mesh strainer or ricer.
Transfer potatoes to a pan and place over medium-low heat.
Add milk, butter and ground black pepper.
Cook, stirring, for 3-4 minutes or until creamy and fluffy.
Serve with your favorite roasts, shepherd’s pie, meatloaf, meatballs, sausage etc