These potatoes are a testament to how simple ingredients can create profound flavors. The potatoes and red onions truly absorb all the tangy-sweet balsamic vinegar, becoming wonderfully sticky and utterly irresistible. While the salty pancetta adds a deeper, richer flavor dimension, it’s completely optional if you prefer a vegetarian or pork-free version. This dish is designed to be adaptable and delicious for everyone.

Print Recipe

• 1 pound 12 ounces red-skinned potatoes, peeled and cut into 1 1/4 inch (3cm) pieces
• 6 garlic cloves, peeled
• 5 tablespoons (2 1/2 oz) unsalted butter
• 3 (1 lb) red onions, cut into eighths
• 3 1/2 ounces store-bought or homemade pancetta, diced (optional)
• Scant 1/2 cup balsamic vinegar
• 1 tablespoon fresh thyme leaves (not lemon thyme)
• 1 tablespoon olive oil
• Sea salt and freshly ground black pepper, to taste

1. Preheat your oven to 325°F (163°C). Ensure your potatoes are peeled and uniformly cut into 1 1/4 inch (3cm) pieces to promote even cooking.
2. In a large saucepan, add the prepared potatoes and cover them generously with water. Stir in 1 teaspoon of salt. Place the saucepan over high heat and bring the water to a rapid boil. Once boiling, add the peeled garlic cloves and continue to boil for exactly 2 minutes. This brief blanching step helps to soften the potatoes slightly and ensures the garlic cooks through. Drain the potatoes and garlic thoroughly in a colander, then spread them out to cool completely to room temperature.
3. While the blanched potatoes cool, heat a large non-stick skillet over medium heat. Reduce the heat to low and add the unsalted butter, red onions (cut into eighths), and the diced pancetta (if you are using it). Cook this mixture gently, stirring occasionally, until the red onions have softened considerably and become translucent, which typically takes between 10 to 15 minutes. This slow rendering and sautéing process brings out the natural sweetness of the onions and the savory depth of the pancetta.
4. Increase the heat to medium. Pour in the scant 1/2 cup of balsamic vinegar and sprinkle in the fresh thyme leaves. Continue to cook, stirring frequently, until the balsamic vinegar reduces significantly and takes on a thick, syrupy consistency, usually within 2 to 3 minutes. This reduction concentrates the balsamic’s flavor, creating a rich glaze. Remove the skillet from the heat and carefully transfer the fragrant onion-pancetta-balsamic mixture into a large mixing bowl.
5. Add the cooled, blanched potatoes and garlic cloves to the bowl with the onion mixture. Season generously with sea salt and freshly ground black pepper according to your taste. Mix everything together thoroughly, using a spatula or spoon to ensure all the potato and onion pieces are well coated with the flavorful balsamic glaze.
6. Lightly coat the base of a sturdy roasting pan with the olive oil. Carefully tip the entire potato mixture into the prepared roasting pan, spreading it out evenly in a single layer as much as possible. This arrangement is crucial for encouraging optimal caramelization rather than steaming. Roast in the preheated oven for 15 minutes. After this initial roasting period, remove the pan from the oven and give it a good shake or stir with a spatula to ensure the balsamic glaze and melted butter coat all the potatoes and onions evenly. Return to the oven and continue roasting, stirring occasionally every 10-15 minutes, until the potatoes are tender when pierced with a fork, beautifully golden brown, and everything in the pan is wonderfully caramelized, which will take approximately 15 to 20 minutes more (resulting in a total roasting time of around 30-35 minutes).
7. Once roasted to perfection, remove the pan from the oven. Using a spoon or spatula, give the potatoes a final toss around the pan to soak up any remaining delicious juices and caramelized bits that have collected at the bottom. Taste for seasoning and adjust with more salt and pepper if necessary to enhance the flavors. Serve these irresistible balsamic roasted potatoes immediately as a delightful and impressive side dish to your chosen main course.

To ensure your balsamic roasted potatoes turn out perfectly every time and to explore new flavor dimensions, consider these additional tips and creative variations:

Choosing the Right Potatoes

While red-skinned potatoes are suggested for their waxy texture and ability to hold their shape beautifully during roasting, you can certainly experiment with other varieties. Yukon Golds or new potatoes also work wonderfully, offering a creamy interior that contrasts beautifully with the crispy exterior. For a more rustic feel and added nutritional value, you can even leave the skin on your potatoes, just ensure they are thoroughly scrubbed clean before cutting.

Achieving Perfect Caramelization

A key to this dish’s irresistible charm is the rich caramelization of the potatoes and onions. To achieve this, it’s paramount to ensure your oven is fully preheated to the specified temperature. More importantly, avoid overcrowding the roasting pan. When too many ingredients are crammed into a single pan, they tend to steam rather than roast, preventing that coveted golden-brown, crispy exterior. If you’re doubling the recipe or preparing a larger batch, it’s often best to use two separate roasting pans to allow ample space for air circulation. Some testers also noted that increasing the oven heat slightly towards the end of cooking can help achieve a more pronounced caramelization.

Pancetta Alternatives (Making it Vegetarian/Vegan)

The pancetta adds a wonderful depth of savory flavor and a delightful texture. However, if you’re preparing a vegetarian or vegan version, it’s easily omitted without sacrificing too much flavor. For a similar umami kick in a meat-free dish, consider adding a pinch of smoked paprika, a dash of soy sauce (or tamari for a gluten-free option), or finely diced mushrooms that are sautéed alongside the red onions. To make the dish fully vegan, simply swap the unsalted butter for a good quality olive oil or a plant-based butter alternative. The rich balsamic and sweet onions will still provide plenty of flavor.

Herb Substitutions and Additions

Fresh thyme is a classic and delightful pairing with balsamic vinegar and potatoes, offering a delicate earthy aroma. However, don’t be afraid to get creative with your herbs! Fresh rosemary sprigs or finely chopped oregano can offer different, equally appealing aromatic profiles. For a bright, fresh finish, a sprinkle of chopped fresh parsley or basil just before serving can elevate the dish further.

Spice it Up!

For those who enjoy a little warmth and heat in their food, a pinch of red pepper flakes added with the balsamic vinegar can provide a subtle, delicious kick that beautifully complements the sweet and savory notes of the dish.

Optimizing Garlic Flavor

The recipe calls for 6 garlic cloves, which will mellow beautifully during roasting, becoming sweet and tender. If you’re a true garlic lover, feel free to increase this quantity significantly; roasting transforms its sharp edges into a delightful, caramelized sweetness. For an even more intense garlic presence, consider adding a few extra peeled cloves halfway through the roasting process.

Adapted From

The Italian Deli Cookbook

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Nutrition Information