Firstly, you need to preheat the oven to 375°Fahrenheit (190°Celsius). Peel and cut the potatoes into slices of about 0.25-inch thickness.
Place the potato slices in a large bowl and sprinkle with salt, pepper, oregano, chicken stock powder, lemon juice/zest, minced garlic, and olive oil.
Gently mix all the ingredients together so that everything is evenly distributed and the potatoes are evenly coated with the marinade. Grease a baking pan with some olive oil, then add the potato slices to it, making sure that they do not overlap or stick to each other.
Bake for 20 - 30 minutes or until the potatoes are golden brown. Take out of the oven and let cool before serving.