Preheat oven to 220°C.
Pour 1 litre of water into the Thermomix bowl and boil 12 min/Varoma/speed 4 Or until temperature has reached Varoma.
Place the peeled and halved potatoes into the Varoma dish and steam 12 min/Varoma/speed 4. Empty the water from the Thermomix bowl and place bowl back in the cradle, with Varoma on top with Varoma lid off. 5 min/speed 4. This will help dry out the potatoes which is the key to crunchy.
Place Varoma lid back on and give it a little shake to roughen up the potatoes a little. Pat dry the potatoes with paper towel.
Place potatoes in fridge for at least 1 hour, uncovered, to dry out.
Drizzle some EVOO in the baking dish and tip the potatoes in. Adding more EVOO and the garlic cloves, salt and pepper. Mix it all around with your hands, adding extra EVOO as needed.
Bake for 40 minutes, or until nearly done. Add the EVOO coated sage leaves on top of the potatoes and return to the oven for 10 minutes. Watch that the sage doesn't burn. Add more salt flakes to serve.