Wash and quarter the red potatoes, leaving the skins on. Place them in a large pot and cover them with water.
- Add a pinch of salt to the water and bring it to a boil. Reduce to a simmer and cook for 15-20 minutes until fork-tender.
- While the potatoes cook, melt the butter in a small pan over low heat and add the minced garlic. Cook for 1-2 minutes until fragrant.
- Drain the potatoes and return them to the pot. Mash them using a potato masher or fork to your desired consistency.
- Gradually add the melted garlic butter and milk (or cream), continuing to mash until smooth and creamy.
- Season with salt and pepper to taste, and drizzle with olive oil if desired. Garnish with fresh parsley or chives.
- Serve warm as a side dish.