Why You'll Love This Recipe
Winter mornings call for something hearty yet affordable. This garlic‑and‑rosemary roasted potato gratin delivers a velvety layer of thinly sliced potatoes, infused with fragrant herbs and a golden, cheesy crust. It’s a breakfast that feels indulgent without breaking the bank, perfect for families or solo diners looking for comfort on a cold day.
Step‑by‑Step Instructions
Prepare the potatoes
Preheat oven to 200 °C (400 °F). Slice potatoes 2‑mm thin using a mandoline or sharp knife. Place slices in a bowl of cold water to prevent browning, then pat dry thoroughly.
Mix aromatics
In a small saucepan, combine milk, minced garlic, chopped rosemary, a pinch of salt, and pepper. Warm over low heat just until fragrant—about 3 minutes—do not boil.
Layer the gratin
Grease a 23 cm (9‑inch) baking dish. Arrange a third of the potatoes in an even layer, overlapping slightly. Sprinkle with a third of the cheddar, then pour a third of the herb‑milk mixture. Repeat twice, finishing with Parmesan on top.
Bake to perfection
Cover the dish with foil and bake for 25 minutes. Remove foil and continue baking 15‑20 minutes, or until the potatoes are tender and the top is a deep golden brown.
Rest and serve
Allow the gratin to rest 10 minutes before slicing. This lets the sauce set, making portions clean and the flavors meld. Serve hot with a crisp green salad or a dollop of plain yogurt.
Expert Tips
Tip #1: Uniform Slices
A mandoline guarantees even thickness, which ensures all layers cook at the same rate and prevents soggy spots.
Tip #2: Cheese Balance
Mix a sharp cheddar with a milder cheese for depth; the sharpness cuts the richness while the mild melts smoothly.
Tip #3: Make‑Ahead
Assemble the gratin the night before, refrigerate uncovered, then bake straight from the fridge—add 5 minutes to the cooking time.
Storage & Variations
Cool the gratin completely, then store in an airtight container for up to 3 days. Reheat individual slices in a toaster oven or microwave. Swap rosemary for thyme, add thinly sliced leeks for extra sweetness, or use sweet potatoes for a colorful twist.
