Roasted Fingerling Potatoes & Green Beans in Tarragon Sauce

The aroma of tarragon always takes me back to my grandmother’s garden. She had a small herb patch tucked away by the back fence, and I remember snipping sprigs of tarragon with her, the anise-like fragrance clinging to my fingers. She’d often toss it into simple salads or pair it with roasted vegetables, a testament to how a single herb can elevate even the most humble ingredients into something extraordinary. This recipe, with its creamy tarragon dressing, is a direct homage to those sunny afternoons, a reminder that the best flavors are often the simplest.

Recipe Overview

• Prep Time: 20 minutes
• Cook Time: 32 minutes
• Total Time: 52 minutes
• Servings: 4-6
• Dietary Type: Vegetarian

Ingredients

• 1 1/2 lbs fingerling potatoes
• 1 1/2 tablespoons olive oil, divided
• 1 teaspoon salt, divided
• 3/4 teaspoon cracked pepper, divided
• 1/2 lb tiny green beans (haricots verts)

Creamy Tarragon Dressing

• 1/4 cup buttermilk
• 2 tablespoons fresh lemon juice
• 1 teaspoon sugar
• 1 teaspoon dijon-style mustard
• 3/4 teaspoon salt
• 1/4 teaspoon fresh coarse ground black pepper
• 1/2 cup olive oil
• 2 tablespoons finely chopped green onions
• 1 tablespoon chopped fresh tarragon

Equipment Needed

• Large bowl
• Jelly-roll pan (2)
• Small bowl
• Whisk
• Serving Platter

Instructions

1. Preheat your oven to 425°F (220°C). Proper preheating is crucial for achieving that delightful caramelization on the potatoes.

2. Prepare the fingerling potatoes. Cut them in half lengthwise and place them in a large bowl. This ensures even cooking and allows the potatoes to soak up the flavorful oil and seasonings.

3. Toss the potatoes with 1 tablespoon of olive oil, 1/2 teaspoon of salt, and 1/2 teaspoon of cracked pepper. Make sure each potato half is coated evenly for maximum flavor.

4. Arrange the potato halves, cut sides up, in a jelly-roll pan. Placing them cut-side up encourages browning and a crispier texture. Avoid overcrowding the pan to ensure proper air circulation.

5. In the same bowl, toss the green beans with the remaining 1/2 tablespoon of olive oil, 1/2 teaspoon of salt, and 1/4 teaspoon of pepper. A light coating of oil helps the green beans roast beautifully without drying out.

6. Place the green beans in another jelly-roll pan. Again, avoid overcrowding.

7. Bake the potatoes at 425°F (220°C) for 30 to 32 minutes, or until they are tender and nicely browned. Check for doneness by piercing a potato with a fork; it should slide in easily.

8. While the potatoes are baking, prepare the Creamy Tarragon Dressing. In a small bowl, whisk together the buttermilk, fresh lemon juice, sugar, Dijon-style mustard, 3/4 teaspoon of salt, and 1/4 teaspoon of fresh coarse ground black pepper until well combined. The sugar helps balance the acidity of the lemon juice.

9. Gradually whisk in the olive oil in a slow, steady stream, whisking constantly until the dressing is smooth and emulsified. This slow incorporation is key to creating a creamy, stable emulsion.

10. Whisk in the finely chopped green onions and chopped fresh tarragon. These fresh herbs add a bright, herbaceous note to the dressing.

11. The dressing can be used immediately or stored in an airtight container in the refrigerator for up to 2 days. If chilled, let the dressing stand at room temperature for 30 minutes before using to allow the oil to loosen and the flavors to meld.

12. Once the potatoes are done, remove them from the oven and let them stand in the pan for a few minutes. This allows the residual heat to continue cooking the potatoes slightly and helps them retain their moisture.

13. Bake the green beans at 425°F (220°C) for 12 minutes, or until they are bright green and slightly tender-crisp. Overcooked green beans can become mushy, so keep a close eye on them.

14. Arrange the roasted green beans around the roasted potatoes on a serving platter. This creates an appealing visual presentation.

15. Drizzle generously with the Creamy Tarragon Dressing. Serve immediately and enjoy the symphony of flavors!

Expert Tips & Tricks

• For extra crispy potatoes, try parboiling them for about 5 minutes before roasting. This helps to create a fluffier interior and a crispier exterior. Make sure to dry them thoroughly before tossing with oil and seasonings.
• If you prefer a tangier dressing, add a splash of white wine vinegar.
• Don’t have buttermilk on hand? You can make a quick substitute by adding 1 tablespoon of lemon juice or white vinegar to a cup of milk. Let it stand for 5 minutes to thicken.
• Fresh tarragon is essential for the best flavor, but in a pinch, you can use dried tarragon. Use about 1 teaspoon of dried tarragon for every tablespoon of fresh.

Serving & Storage Suggestions

This dish is best served warm, right after roasting, to enjoy the crispness of the potatoes and green beans. It makes a fantastic side dish to grilled chicken, fish, or a vegetarian main course.

Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. The potatoes may lose some of their crispness upon reheating, but the flavor will still be delicious. Reheat in a skillet over medium heat or in a preheated oven at 350°F (175°C) until warmed through. The dressing should be stored separately and drizzled over the reheated vegetables just before serving. It is not recommended to freeze this dish, as the texture of the potatoes and green beans will suffer.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	380 kcal	19%
Total Fat	28g	43%
Saturated Fat	4g	20%
Cholesterol	5mg	2%
Sodium	850mg	35%
Total Carbohydrate	30g	10%
Dietary Fiber	5g	20%
Sugars	5g	–
Protein	4g	8%

Note: Nutritional information is an estimate and may vary based on specific ingredients and preparation methods.

Variations & Substitutions

• Herb Variations: Experiment with other fresh herbs like dill, parsley, or chives in the dressing for a different flavor profile.
• Potato Substitutions: If you can’t find fingerling potatoes, small red potatoes, halved, or russet potatoes, quartered, will also work well. Adjust baking times accordingly: red potatoes will take about 35 minutes, and russet potatoes about 40 minutes.
• Vegan Adaptation: Substitute the buttermilk in the dressing with a plant-based alternative like unsweetened almond milk or soy milk. Add a tablespoon of vegan sour cream for a similar creamy texture.
• Spice it Up: Add a pinch of red pepper flakes to the potatoes and green beans before roasting for a touch of heat.

FAQs (Frequently Asked Questions)

Q: Can I make the dressing ahead of time?
A: Absolutely! The dressing can be made up to 2 days in advance and stored in an airtight container in the refrigerator. Let it sit at room temperature for 30 minutes before serving to allow the flavors to meld.

Q: What if I don’t have fresh tarragon?
A: While fresh tarragon is ideal, you can substitute with dried tarragon. Use about 1 teaspoon of dried tarragon for every tablespoon of fresh.

Q: Can I use frozen green beans?
A: Fresh green beans are recommended for this recipe, as they roast better than frozen. However, if you only have frozen, thaw them completely and pat them dry before roasting to prevent them from becoming soggy.

Q: How do I prevent the potatoes from sticking to the pan?
A: Make sure the potatoes are well-coated with olive oil before roasting. You can also line the jelly-roll pan with parchment paper for easy cleanup and to prevent sticking.

Q: Can I add other vegetables to this dish?
A: Certainly! Consider adding sliced bell peppers, red onion wedges, or asparagus spears to the roasting pan along with the potatoes and green beans. Adjust the roasting time as needed, depending on the vegetables you choose.

Final Thoughts

I hope this recipe brings a little sunshine to your kitchen, just as it did in my grandmother’s garden. Don’t be afraid to experiment with the herbs and seasonings to create your own unique version. I encourage you to gather your ingredients, preheat that oven, and create a dish that’s not only delicious but also a beautiful expression of simple, fresh flavors. Let me know how it turns out and what variations you tried – I’m always eager to hear your feedback!