In a small bowl, add the yeast, sugar and water. Mix and cover. Keep aside for 10-15 minutes. By then it will froth up and it is ready to be used.
In a large bowl, add the flour and all the dry spices. Mix well and add the spinach puree along with the yeast mix.
Combine well and knead for 2-3 minutes into a very soft dough . Add more lukewarm if required. Cover with a wet cloth and keep aside in a warm place for 30 minutes.
Add the butter and again knead for 2-3 minutes. Cover and keep aside for a further 30 minutes.
Punch back the dough and divide into equal round balls. Place them on a baking sheet, cover with a wet cloth and keep aside for an hour.
Brush with melted butter and sprinkle some sesame seeds & nigella seeds. Bake in a preheated oven at 200 degrees C. for 22-25 minutes.
Cool on a wire rack and relish as an evening tea-time snack.