Mix the milk, yeast and sugar in small bowl and leave for about 30 minutes.
Mix the flour, baking powder and salt. Add the yeast-mixture and stir well. Add the oil and knead the dough until it is smooth and does not stick to your hands anymore.
Butter a spring form (26 cm diameter). Alternatively one can use a large cast iron pan.
Divide the dough into 7 pieces and place into the spring form. Leave to rise for about 1 hour. I left mine to rise about 3 hours and it rose so much that one could no longer distinguish the individual rolls, as you can see in the pictures.
Preheat the oven to 200°C.
Melt the margarine in a small bowl.
Carefully spoon the margarine over the rolls. Sprinkle with rosemary and sea salt.
Place into the oven for about 12 minutes until they are nice and brown.