Add the grated carrot, zucchini and brown onion to a bowl together with the spring onions, eggs, olive oil, salt & pepper, buckwheat flour, tapioca starch & salt. Mix together until well combined.
Add the sliced bacon and stir through. Pour mixture into a greased baking dish, top with halved cherry tomatoes and bake until golden and cooked through.
Slice and serve warm or refrigerate in an airtight container.