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Roasted Leeks and Potatoes made 2 ways! For a veggie filled side dish, try these potatoes and leeks for a side dish that's easy and delicious.

Oven Roasted Leeks and Potatoes (Air Fryer Option))

  • Author: Lindsay Cotter
  • Total Time: 45 minutes
  • Yield: 4 -5 servings 1x
  • Diet: Vegetarian


The perfect addition to any meal, these Oven Roasted Leeks and Potatoes are a healthy side dish that can be whipped up in no time! Air Fryer Option, Whole30 Friendly.


Units Scale
  • 2 leeks (stem only), sliced
  • 1 pound red potatoes or gold potatoes – sweet potato or yam may be substituted
  • 1/3 to 1/2 cup sliced red onion or shallot
  • 1 large garlic clove (1/2 to 1 teaspoon, minced)
  • 1/4 cup to 1/3 cup olive oil or refined avocado oil, adjust as desired.
  • 1 Tablespoon balsamic vinegar
  • 1/2 teaspoon kosher salt and ground pepper each (divide)
  • Optional – 1/2 cup to 1 cup leafy greens (ex: spinach leaves).
  • Lemon to garnish (sliced and juice)
  • Herbs to garnish – Chopped fresh parsley, thyme, or oregano


  1. Preheat the oven to 425° F. Wash the vegetables.
  2. Cut off the green tops of the leeks. Trim the root off the leeks. Starting at one end, cut the leek into thin round slices (1/2 inch to 1 inch). See notes for alternative cutting options. Place into a bowl of water to help remove sediment.
  3. While the leeks are sitting, slice the potatoes into quarters. Then, peel and slice the red onion into thin strips.
  4. Remove the leeks from the water, and place all vegetables into a clean mixing bowl.
  5. Add 1 minced garlic clove, 1/3 cup olive oil (adjust as desired), 1 Tablespoon balsamic vinegar, 1/4 teaspoon of sea salt, 1/4 teaspoon or more of the black pepper, and a squeeze of lemon juice.
  6. Toss all of the ingredients together until the vegetables are well-coated. Arrange the vegetables on a sheet pan in a single layer. 
  7. Roast at 425° F in the oven for 30-35 minutes. TIP – Halfway through roasting, flip over the potatoes and check the leeks/onion for doneness. If the leeks/onion are fully cooked, remove them from the oven, and place them on a serving plate/bowl. (See notes for alternative cooking tips). Continue to cook the potatoes for the full amount of time.
  8. Once the potatoes are done, remove from the oven, and combine them with leeks/onion. Season with extra salt/pepper, if desired.  
  9. If adding greens, lightly steam the greens in microwave or stovetop until softened. 
  10. Mix the steamed greens together with the potato, leeks, and onions.
  11. Toss with fresh lemon juice and herbs to garnish. Serve immediately.
  12. Storage: To store, let the potato and leek roast cool. Then, pace it in an airtight container. Best kept in the fridge for up to 4 days. To reheat from the fridge, place the leek and potato roast in an oven-safe dish. Warm in the oven at 350° F for 5-10 minutes or until the desired temperature is reached.

Air Fryer Option: 

  1. Preheat the air fryer to 400° F. 


Optional: For more even cooking times, slice the leeks in half instead of rounds. (See blog post for photos.)

For easy clean-up and even cooking, you may place seasoned leeks and onions in foil and then on a sheet pan with the potatoes. Remove the leeks in the foil once they are golden and crispy, around halfway through cooking. Toss the potatoes and continue to cook for an additional 15-20 minutes.

  • Prep Time: 10 minutes
  • Cook Time: 35 minutes
  • Category: Side Dish
  • Method: Oven
  • Cuisine: American


  • Serving Size: 1
  • Calories: 233
  • Sugar: 2.9
  • Sodium: 25.7
  • Fat: 13.8
  • Saturated Fat: 1.9
  • Carbohydrates: 25.7
  • Fiber: 3.5
  • Protein: 3.3
  • Cholesterol: 0

Keywords: leeks, potatoes, air fryer, baking, side dish