Balsamic Cherry Tomato Onion Conserve: A Taste of Summer Preserved

The first time I tasted something similar to this conserve, I was wandering through a small farmers market in Tuscany. The sun was beating down, cicadas were buzzing, and the air smelled of ripe tomatoes and sun-baked earth. An elderly woman, her hands gnarled from years of working the land, offered me a taste of her cipolle caramellate. The explosion of sweet, tangy, and savory flavors was an absolute revelation. This recipe, inspired by that simple taste of Italian sunshine, brings a touch of that magic to my own kitchen and hopefully to yours as well.

Recipe Overview

• Prep Time: 20 minutes
• Cook Time: 25 minutes
• Total Time: 45 minutes
• Yields: 5 half-pints
• Serves: 40
• Dietary Type: Vegetarian, Gluten-Free

Ingredients

• 2 tablespoons butter
• 2 tablespoons olive oil
• 2 lbs sweet onions, quartered and thinly sliced
• 2 teaspoons sea salt
• 1 teaspoon sugar
• 2 pints cherry tomatoes, halved
• ¾ cup honey
• ¼ cup balsamic vinegar
• ½ teaspoon fresh ground black pepper

Equipment Needed

• Large skillet or Dutch oven
• Sterilized half-pint jars
• Jar lifter
• Boiling water canner
• Wire racks

Instructions

1. Begin by preparing your onions. Quarter and thinly slice 2 pounds of sweet onions. Remember, uniformity in size will ensure even cooking.

2. In a large skillet or Dutch oven, melt 2 tablespoons of butter together with 2 tablespoons of olive oil over medium-low heat. The combination of butter and oil provides a rich flavor and prevents the butter from burning.

3. Add the sliced onions, 2 teaspoons of sea salt, and 1 teaspoon of sugar to the skillet. The salt will help draw out moisture from the onions, aiding in their softening, while the sugar assists in caramelization.

4. Cover the skillet and cook, stirring occasionally, for 13 to 15 minutes, or until the onions are tender. Keeping the skillet covered helps to trap steam and speed up the process.

5. Uncover the skillet, increase the heat to medium-high, and continue to cook, stirring frequently, until the onions are a deep golden brown, about 3 to 5 minutes. This is where the magic happens – the natural sugars in the onions caramelize, creating a deep, complex flavor. Be careful not to burn them; stir constantly and adjust the heat as needed.

6. Stir in 2 pints of halved cherry tomatoes and ¾ cup of honey. The honey complements the natural sweetness of the tomatoes and onions, while the tomatoes add a burst of juicy acidity.

7. Bring the mixture to a boil, then reduce the heat to medium-high and boil until the tomatoes are soft, about 5 minutes, stirring frequently. Watch carefully to prevent scorching.

8. Remove the skillet from the heat and stir in ¼ cup of balsamic vinegar and ½ teaspoon of fresh ground black pepper. The balsamic vinegar provides a crucial tang that balances the sweetness, while the pepper adds a subtle warmth.

9. Ladle the hot mixture into hot, sterilized half-pint jars, leaving ¼-inch headspace. Headspace is the space between the top of the food and the lid of the jar; this allows for proper sealing during the canning process.

10. Wipe the jar rims clean with a damp cloth to ensure a good seal. Apply the lids and screw bands fingertip-tight.

11. Process the jars in a boiling water canner for 5 minutes (begin timing once the water returns to a boil). This process eliminates microorganisms and creates a vacuum seal, preserving the conserve for long-term storage.

12. Using a jar lifter, carefully remove the jars from the canner and place them on wire racks to cool completely. As the jars cool, you should hear a popping sound as the lids seal.

Expert Tips & Tricks

• For a deeper, more complex flavor, consider using a high-quality aged balsamic vinegar. The difference will be noticeable.
• If you don’t have sweet onions, you can use yellow onions, but you may want to add a touch more sugar to compensate.
• Don’t overcrowd the skillet when cooking the onions. If necessary, cook them in batches to ensure even browning.
• If the conserve seems too thin, you can simmer it for a few more minutes, uncovered, to reduce the liquid.
• Always use clean and sterilized jars and canning equipment to prevent spoilage.

Serving & Storage Suggestions

This balsamic cherry tomato onion conserve is incredibly versatile. Serve it alongside grilled meats or fish, spread it on crusty bread with goat cheese, or use it as a topping for bruschetta. It’s also a delicious addition to cheese boards or as a flavorful condiment for burgers and sandwiches.

Store unopened jars in a cool, dark place for up to one year. Once opened, refrigerate and use within 2-3 weeks. If a jar doesn’t seal properly during processing (the lid doesn’t “pop” inward), refrigerate it immediately and use within a few days.

Nutritional Information

(Estimated per serving, serving size: 1 tablespoon)

Nutrient	Amount per Serving	% Daily Value
Calories	44 kcal	N/A
Calories from Fat	11 kcal	N/A
Total Fat	1.3 g	2%
Saturated Fat	0.5 g	2%
Cholesterol	1.5 mg	0%
Sodium	123.6 mg	5%
Total Carbohydrate	8.3 g	2%
Dietary Fiber	0.6 g	2%
Sugars	6.9 g	N/A
Protein	0.4 g	0%

Variations & Substitutions

• Spicy Conserve: Add a pinch of red pepper flakes to the skillet along with the onions for a touch of heat.
• Herb-Infused Conserve: Stir in fresh herbs like thyme or rosemary during the last few minutes of cooking.
• Fig Balsamic: Substitute half the cherry tomatoes with chopped figs for a richer, sweeter conserve.
• Vegan Option: Substitute the butter with olive oil or vegan butter.

FAQs (Frequently Asked Questions)

Q: Do I need to use sterilized jars?
A: Yes, sterilizing the jars is crucial for safe canning and preserving the conserve properly. You can sterilize them by boiling them in water for 10 minutes or running them through a hot cycle in your dishwasher.

Q: Can I use dried herbs instead of fresh?
A: While fresh herbs are preferred for their vibrant flavor, you can use dried herbs. Use about 1/3 the amount of dried herbs as you would fresh.

Q: My conserve seems too sweet. How can I balance the flavor?
A: Add a little more balsamic vinegar or a squeeze of lemon juice to brighten the acidity and cut through the sweetness.

Q: How long will the sealed jars last?
A: Properly sealed jars of balsamic cherry tomato onion conserve can last up to one year in a cool, dark place.

Q: What if the lids don’t seal properly after processing?
A: If the lids don’t seal within 24 hours, refrigerate the jars immediately and use the conserve within a week or two. You can also re-process the jars with new lids.

Final Thoughts

This Balsamic Cherry Tomato Onion Conserve is more than just a recipe; it’s a little jar of summer sunshine, ready to brighten up your meals any time of year. Don’t be afraid to experiment with different variations to suit your taste. I hope this recipe brings as much joy to your kitchen as it has to mine. I encourage you to give it a try, and I can’t wait to hear about your creations and experiences! This conserve pairs beautifully with a glass of crisp Sauvignon Blanc, enhancing the flavors and creating a perfect culinary harmony. Enjoy!