Wash, dry, and trim the ends of 1 pound of zucchini, then slice them into ⅕ inches (½ cm) thin discs.
Heat up 2 tablespoons extra virgin olive oil in a very large skillet, add 1 medium red onion (finely chopped), and fry on medium heat for 3 minutes, stirring often.
Add the zucchini, 1 clove garlic (crushed), ¾ teaspoon salt, ½ teaspoon black pepper, and 1 teaspoon dried oregano.Stir it to spread the seasoning, and fry the zucchini without moving them on medium-high heat for 2 minutes.
Stir and turn them around, cover them with a lid, and cook for 2 more minutes.The lid will help the zucchini cook faster, trapping some steam. This way, we won't need to add liquid to the pan. Keep the top on for only 2 minutes.
Take off the lid, stir, and finish cooking for about 3 to 6 more minutes.Taste and adjust for salt, then when the zucchini is cooked to your liking, add 1 handful flat-leaf parsley (chopped) and the squeezed juice of ½ lemon.
Serve sautéed zucchini as a tasty side dish, or use them to make other recipes.