Mix the oil and sugar. Add the cinnamon, clove, zest. 

Dissolve the baking powder and baking soda in the juice and incorporate into the mixture. 

Knead well, adding as much warm water as is required to make a soft dough. 

If necessary, add a little bit of flour. 

Mix in the walnuts. 

Oil a baking tray and lay out the dough evenly like a bun. 

Make patterns using a fork and poke in 4 places. 

Bake in a preheated oven at 200 degrees. 

Dust with sugar.