Blitz your cauliflower using your food processor until it looks a bit like fine couscous. Or chop / grate as finely as possible.
Add eggs, ground linseeds / flax, whole linseeds / flax and salt to the food processor bowl. Stir with a spoon until combined.
Line a baking tray with baking (parchment) paper. Tip the cauli mixture onto the lined tray then using your hands smooth into a rectangle about 1cm (1/3in) thick.
Bake for 20-25 minutes or until the bread is slightly browned and feels firm and springy when touched.
Cool on the tray for a few minutes then transfer to a wire rack to cool completely. Cut in half crosswise and then into 3-4 lengthwise to make 6-8 slices (or cut to your preferred size).