Step 1

Place the potatoes in a medium saucepan and fill with enough water to cover them by 1 in/2.5 cm. Stir in 1 tsp of salt. Bring to a boil over medium-high heat, then reduce to medium-low and cook until the potatoes are fork-tender but not mushy, 15 to 20 minutes. Drain the potatoes and transfer to a 9 in by 12 in/23 cm by 30.5 cm roasting pan or baking dish.

Step 2

While the potatoes boil, preheat the oven to 425F/220C.

Step 3

Trim the fennel bulb and reserve the tender fronds for the garnish. Cut the bulb lengthwise into thin slices and add them to the roasting pan.

Step 4

Add the olives to the pan. Add the olive oil, garlic, and coriander, and season with salt and pepper. Fold to coat well and transfer to the oven. Roast until the potatoes turn golden brown and the fennel is caramelized, about 1 hour. Rotate and stir the contents of the pan halfway through during roasting to allow even cooking.

Step 5

Once caramelized, sprinkle the parmesan over the potatoes, fold to coat well, and return to the oven. Cook for 5 minutes, until the parmesan melts and turns golden brown. Remove the pan from the oven, drizzle with fresh lemon juice, and fold in the lemon zest. Garnish with the reserved dill fronds and serve hot or warm. Leftovers can be stored for up to 4 days in an airtight container in the refrigerator.