Preheat the oven to 425 degrees F (220 degrees C).
Wash potatoes and pat dry. Cut abnormally large potatoes in half so all potatoes are around the same size (no bigger than 1/2 of a ping pong ball). Transfer to a metal baking pan.
Mix lemon juice and olive oil together and drizzle over potatoes. Sprinkle with garlic powder and salt. Toss until well coated and spread evenly in the pan.
Bake in the preheated oven for 20 minutes. Stir and bake until tender, about 10 minutes more.