Potato & Leek Casserole

Potato and leek casserole is the kind of side dish that disappears off the table without anyone realizing it’s vegan. There’s no cream, no cheese, no butter, just thinly sliced red potatoes, softened leeks, and a measured pour of vegetable broth that turns into a silky natural sauce as the starches release.

The leek work upfront is what makes this dish sing. Sweating the leeks and shredded carrot under a covered lid first pulls out their natural sugars without browning, so they go into the casserole sweet and tender instead of raw and grassy. Skip this step and the leeks will stay sharp and oniony.

Red potatoes are the right call here. Their waxy texture holds shape through the long bake, where russets would collapse into mash. Leaving the skins on adds color and rustic texture.

A teaspoon of dried rosemary is what pulls the dish into roast-dinner territory. Use it sparingly, as powdered rosemary is potent and a heavy hand turns the casserole medicinal.

The last 10 minutes uncovered crisp the top edges so you get a contrast against the silky middle.

Kitchen Tips

• Slice potatoes as thin and even as possible. A mandoline gives consistent thickness so every layer cooks at the same rate.
• Wash leeks well between the layers. Grit hides deep and ruins the dish if missed.
• Don’t skip the broth. It hydrates the potatoes from below and prevents a dry casserole.
• Let the casserole rest 10 minutes after baking so the layers set up and slice cleanly.

Variations

• Swap carrots for shredded zucchini for a summer version.
• Use half finely chopped yellow onion in place of half the leek.
• Sprinkle vegan parmesan or nutritional yeast on top before the uncovered bake for a nutty, savory finish.