In a large bowl mix together the flour, salt and yeast. Then add the water, honey, and oil. Add the chopped nettles, mix well to form a soft dough. Turn out on a floured surface and knead for 10 min by hand until the dough is smooth and elastic. Drizzle a little olive oil into a bowl, pop the dough in, cover and leave to rise in a warm spot for 2 hours, or until doubled in size.