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Caramelized Onion, Leek & Herb Potato Tart with Roasted Garlic

A savory vegan tart with a smashed potato crust filled with slow-caramelized onions, leeks, and fresh herbs. Rustic, comforting, and perfect for brunch or dinner.

By Linda Bailey
Caramelized Onion, Leek & Herb Potato Tart with Roasted Garlic
25 min
Prep Time
45 min
Cook Time
1 hr 10 min
Total Time
6
Servings

Ingredients

  • For the potato crust: 1 lb mini red and gold potatoes
  • 4-6 garlic cloves, peeled
  • 1-2 tbsp olive oil
  • Salt and pepper, to taste
  • For the filling: 2 large leeks, white and light green parts only, sliced and rinsed
  • 2 tbsp olive oil
  • 2-3 large onions, thinly sliced
  • 2 garlic cloves, minced
  • 1/2 tsp fresh thyme leaves (or 1/4 tsp dried)
  • 1/4 tsp nutmeg
  • 1/4 tsp smoked paprika
  • 1/3 cup unsweetened dairy-free yogurt or silken tofu
  • Salt and pepper, to taste
  • Fresh parsley or chives, for garnish

Instructions

  1. 1
    Make the potato crust

    Preheat the oven to 400F (200C). Parboil potatoes and garlic in salted water for 10-12 minutes until just tender. Drain and cool slightly. Grease a 9-10 inch tart pan.

  2. 2
    Press and bake the crust

    Smash the potatoes and garlic lightly with a fork or the bottom of a cup and press them into the pan, forming a crust on the bottom and sides. Drizzle with olive oil and season with salt and pepper. Bake for 15 minutes until slightly golden.

  3. 3
    Caramelize the onions and leeks

    Heat 2 tbsp olive oil in a skillet over medium heat. Cook onions with a pinch of salt for 15-20 minutes, stirring occasionally, until caramelized. Add leeks and minced garlic; cook 5-7 minutes until softened.

  4. 4
    Make the filling

    Stir in thyme, nutmeg, smoked paprika, salt, and pepper. Remove from heat and fold in dairy-free yogurt or silken tofu until creamy. Adjust seasoning.

  5. 5
    Assemble and bake

    Spoon the onion-leek mixture into the potato crust. Bake at 375F (190C) for 15-20 minutes, until the filling is set and potato edges are lightly crisp. Let cool 5-10 minutes, then garnish with fresh parsley or chives.