||Halve the garlic cloves lengthwise, slice into 2 or 3 pieces. Set aside.
Pour enough olive oil into a frying pan to cover the bottom. Place over medium high heat, and heat until a zucchini slice dropped into it sizzles on contact. Put a single layer of zucchini slices into the pan and cook, turning once, until well browned on both sides — about 5 minutes. As the slices are ready, lift them from the oil with a slotted spoon and put them in a serving bowl. Continue cooking the slices until all are finished.
Sprinkle the zucchini with salt; add the garlic and stir in 1 ½ tablespoon vinegar, mixing gently. Add the mint leave and stir once. Place in the refrigerator until the zucchini is no longer warm, about 30 minutes. Taste and adjust with a little more vinegar if desired. Serve immediately or wait until the next day after they have had a chance to marinate.