Creating roasted garlic mashed turnips is a straightforward process. Follow these steps to achieve a perfect dish:

1. Preheat the Oven
   Begin by preheating your oven to 400°F (200°C). This ensures that your turnips roast evenly and develop a delightful flavor.
2. Prepare the Turnips and Garlic
   On a baking sheet, toss the cubed turnips and peeled garlic cloves with olive oil, salt, and pepper. Ensure each piece is well-coated for optimal roasting.
3. Roast the Vegetables
   Place the baking sheet in the preheated oven and roast the turnips and garlic for 25-30 minutes. They should be tender and slightly golden.
4. Heat the Vegetable Broth
   In a pot over low heat, warm up the vegetable broth. This step helps integrate the flavors and ensures a smooth texture when mashing.
5. Mash the Turnips
   Add the roasted turnips and garlic to the pot with the heated broth. Use a potato masher or immersion blender to mash the mixture until smooth.
6. Incorporate the Butter
   Stir in the butter, allowing it to melt into the mashed turnips. Adjust the seasoning with additional salt and pepper if needed.