I toast the walnuts then chop them until they're fairly small. Go heavy on the lemon zest! A medium zuke usually yields 2C grated, so I double the recipe and make 36 mini muffins. 13 - 14 minutes is plenty of time to cook these and I fully rotate the trays (I have 6 muffin trays so put 2 on a quarter sheet pan) halfway through baking. I don't sugar the tops because I think there's enough sugar already between the sugar and the raisins.
