In a large bowl add flour, yeast, mashed potato, sugar, rosemary, garlic and mix well. Add oil, salt, water and mix with a spatula to form a dough.
Transfer to a lightly floured surface and knead the dough well for 8-10 minutes to form a smooth and non-sticky dough.
Keep the dough in a lightly oiled bowl in a warm place and cover with a tea towel. Let the dough rise for 1 ½ hours or until doubled.
Lightly grease the bottom and sides of a 8-inch or 9-inch baking pan. Punch down the dough and transfer to a lightly floured surface.
Divide the dough into 8 portions. Shape each portion into smooth rolls and place in the baking pan about 1-inch apart.
Cover with a tea towel and keep in a warm place for 30-45 minutes or until the rolls have filled up the entire plan. Preheat the oven to 180 °C | 350 °F.
Melt the butter and add the garlic powder. Brush the top of the rolls gently with the butter. Sprinkle rosemary, sea salt and pepper.
Bake for 20-25 minutes or until golden brown. Remove from oven and brush with remaining butter.
Notes
If using active dry yeast, sprinkle the yeast over lukewarm water and let it sit until frothy. Add rest of the ingredients and make dough.
The topping is optional. You can simply brush the top of rolls with melted butter.
You can use vegetable oil or canola oil instead of olive oil.