Add the buttermilk, grated zucchini, carrot and cheese and mix until combined. Try not to over-mix.
Scoop the mixture out on to a floured surface and form into a flattened ball.
Cut the dough into eight (easiest to cut almost like a pizza across four times) and gently smooth the edges of each to make eight rolls.
Place the rolls onto floured baking sheets, you can cut a cross shape on the top of each if you like, then place in the oven for 40mins until brown. You can test if you get a hollow sound when you tab the bottom of one.