Prepare the garlic sauce: In a small bowl, combine the minced garlic, minced rosemary, and olive oil. Season with salt and pepper to taste, mix thoroughly, and set aside.
Arrange the potatoes: Drizzle 1 tablespoon of olive oil into a 10 x 5 x 2-inch (25 x 13 x 2 cm) baking dish. Arrange the potato slices upright/horizontally in two intertwined rows.
Bake: Brush the potato slices generously with the garlic sauce using a pastry brush. Scatter the rosemary leaves on top, pour in the vegetable stock, and bake at 360°F (180°C) for 45 minutes.