Sweat zucchini - Grate 2 of the zucchinis using a box grater. Toss with the salt then set aside for 20 minutes. Grab handfuls and squeeze out excess liquid (no need to be super forceful here but make a bit of effort!). You should have 2 very tightly packed cups. Set aside.

Decorative zucchini - Finely slice the 3rd zucchini however you want, to decorate the surface. I cut the zucchini in half then into long strips. Thin coins is also nice. Toss with the oil and pepper.

Preheat the oven to 200°C/400°F (180°C fan-forced). Lightly grease a 23 x 33cm / 9 x 13" metal pan with butter. Line with paper with overhang (so you can lift it out later).

Batter - Whisk the Dry ingredients in a large bowl using a handheld whisk. Make a well in the centre. Whisk the Wet ingredients in a separate bowl until combined. Pour the Wet into the Dry ingredients. Mix using a wooden spoon until the flour is mostly incorporated but there's still flour visible.

Add-ins - Add zucchini and cheese then mix through. Some flour lumps is fine. Minimise mixing else the crumb will be tough. The batter will be thick - the zucchini will sweat more in the oven.

Bake - Scrape into the prepared pan and smooth the surface. Top with the zucchini slices. Bake for 40 minutes or until a skewer inserted in the middle comes out clean.

Cool - Sprinkle with sea salt flakes. Cool in the pan for 10 minutes. Use the excess paper to slide the slab onto a cooling rack then remove the paper. Cool for at least another 10 minutes.

Cut into pieces (3 x 5 pieces, or 4 x 5). Nobody ever says no to a smear of butter either, especially if served warm!