Roasting tomatoes before canning enhances their natural sweetness and adds a rich, smoky depth that elevates any dish. This method locks in intense flavor while preserving the tomatoes for year-round use, making it a fantastic way to enjoy summer’s bounty.
Ingredients
- 5 pounds ripe Roma or plum tomatoes
- 3 tablespoons olive oil (optional, for roasting)
- 1 teaspoon kosher salt (optional, per quart jar)
- 2 tablespoons bottled lemon juice or 1/2 teaspoon citric acid per quart jar
- Water (for boiling water bath)
- Fresh basil or garlic cloves (optional, for added flavor)
Instructions
- Preheat your oven to 425°F (220°C). Wash tomatoes thoroughly and remove stems.
- Cut tomatoes in halves or quarters depending on size. Spread them cut-side up on a large baking sheet lined with parchment paper.
- Drizzle with olive oil and sprinkle lightly with salt if desired. Roast for 30-40 minutes until skins are blistered and tomatoes have reduced and caramelized.
- Remove from oven and let cool slightly. Peel off skins if preferred (optional step; skins can be left on for texture).
- Prepare canning jars and lids by washing and sterilizing them in boiling water or dishwasher.
- Add 2 tablespoons bottled lemon juice or 1/2 teaspoon citric acid to each quart jar to ensure safe acidity.
- Pack roasted tomatoes tightly into hot jars, leaving about 1/2 inch headspace. Add any optional flavorings like basil or garlic if using.
- Wipe jar rims clean with a damp cloth, then place lids and screw bands on fingertip tight.
- Process jars in a boiling water bath canner for 40 minutes (adjust time for altitude, adding 5 minutes for every 1,000 feet above 1,000 ft).
- Remove jars carefully and let cool on a towel or rack undisturbed for 12-24 hours. Check seals before storing.
Tips
- Tomato choice: Roma or plum tomatoes have thicker flesh and fewer seeds, making them ideal for roasting and canning.
- Acidity is key: Always add bottled lemon juice or citric acid to each jar to prevent botulism. Fresh lemon juice varies in acidity and is not recommended.
- Roasting optional: If you prefer a fresher tomato flavor, you can skip roasting and can raw tomatoes, but roasting intensifies sweetness and flavor.
- Altitude adjustments: Boiling water bath times must be increased if you live above 1,000 feet. Consult USDA guidelines for precise times.
Serving Suggestions
Canned roasted tomatoes are incredibly versatile. Use them as a base for rich pasta sauces, stews, and soups, or blend them into salsa or barbecue sauces. They also work beautifully in shakshuka or as a topping for bruschetta. Simply open a jar when you want a quick burst of roasted tomato flavor without the hassle of fresh prep.
Variations
You can customize canned roasted tomatoes by adding herbs like oregano, thyme, or rosemary before packing them into jars. For a smoky twist, add a chipotle pepper or smoked paprika. If you want a smoother texture, pulse the roasted tomatoes in a blender before canning but keep in mind this may require adjusting processing times. For a spicy version, add red pepper flakes or a jalapeño slice per jar.
Storage and Reheating
Store sealed jars in a cool, dark place for up to 12 months. Once opened, refrigerate and use within 5 to 7 days. When reheating, gently warm the tomatoes on the stove or in the microwave. Avoid boiling after opening to preserve texture and flavor. If you notice any off smells, discoloration, or bubbling, discard immediately as it may indicate spoilage.
Frequently Asked Questions
Can I use a pressure canner instead of a boiling water bath for canned roasted tomatoes?
Because tomatoes are borderline acidic, a boiling water bath with added acid (lemon juice or citric acid) is USDA-approved and sufficient. Pressure canning is not necessary unless you add low-acid ingredients like meat or vegetables.
Do I need to peel the tomatoes before roasting and canning?
Peeling is optional. Roasting softens the skins, and some prefer to remove them for a smoother texture. Others leave skins on for added fiber and rustic appearance. It won’t affect safety.
How do I know if my jars sealed properly?
After cooling 12-24 hours, press the center of each lid. If it doesn’t pop back, the jar is sealed. You can also remove the screw band and lift the jar by the lid—sealed lids stay firmly attached.
Can I add salt or sugar when canning roasted tomatoes?
Yes, adding up to 1 teaspoon salt per quart is common for flavor, but it’s optional and does not affect safety. Sugar is rarely added to plain roasted tomatoes but can be included if desired.
What if I don’t have bottled lemon juice or citric acid?
For safety, use only bottled lemon juice or food-grade citric acid. Fresh lemon juice acidity varies and is not recommended for canning. Without added acid, canned tomatoes risk unsafe pH levels.
Can I freeze roasted tomatoes instead of canning?
Yes, freezing is a great alternative and preserves flavor well. Pack cooled roasted tomatoes into freezer-safe containers or bags, leaving headspace for expansion. Freeze up to 6 months. Thaw in the fridge before using.
By following this detailed canning roasted tomatoes recipe, you can preserve peak-season flavor with confidence and enjoy rich, smoky tomatoes all year long. Whether you use them in sauces, soups, or as a side, these canned roasted tomatoes bring a gourmet touch to everyday meals.
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