Safety classification
Insufficient information
Testing authority: Quattro Stagioni source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Safety classification
Insufficient information
Testing authority: Quattro Stagioni source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Publisher source
Preparation timeline
- Clean and prepare the mixed fruit, removing pits, cores, or damaged portions as appropriate.
- Combine the prepared fruit, granulated sugar, and lemon juice in a nonreactive saucepan.
- Cook while stirring until the fruit breaks down and the mixture reaches a jam consistency. Use a cold-plate gel test if desired.
- Transfer the hot jam to clean heat-safe jars, leaving room for expansion if freezing.
- Because the available source does not provide a validated jar size, headspace, heat-process, or altitude schedule, cool promptly and refrigerate or freeze. Do not store at room temperature.
Equipment
- Quattro Stagioni-style jars
- Nonreactive saucepan
- Canning funnel
- Cold saucer
Visual method guide
- Prepare: Clean and prepare the mixed fruit, removing pits, cores, or damaged portions as appropriate.
- Combine or cook: Combine the prepared fruit, granulated sugar, and lemon juice in a nonreactive saucepan.
- Fill: Cook while stirring until the fruit breaks down and the mixture reaches a jam consistency. Use a cold-plate gel test if desired.
- Process: Transfer the hot jam to clean heat-safe jars, leaving room for expansion if freezing.
Safety summary
⚠️ Safety classification: incomplete/untested for shelf-stable home
Modern safe adaptation: For shelf-stable storage, select a research-tested jam recipe for the exact fruit or fruit combination and follow its complete boiling-water processing instructions without changing proportions.
INSUFFICIENT INFORMATION. No validated fruit specification, jar size, headspace, process, or altitude schedule; refrigerate or freeze.
Treat this as a refrigerated or frozen preparation, or replace it with a complete tested shelf-stable formula.
Do not infer a
When a validated process is absent, cool promptly and refrigerate or freeze; do not store at room temperature.
Editorial review: Safety classification and source limitations were reviewed. Re-review after any source or recipe change.
About this recipe
Italian mixed-fruit jam from a Quattro Stagioni promotional collaboration, retained with an explicit refrigerator/freezer safety adaptation.
Before you begin
- Method
- Boiling-water
canning - Headspace
- Use the recipe-card headspace
- Recipe standard
- Use the complete formula and directions in the recipe card.
Safety classification
Insufficient information
Testing authority: Quattro Stagioni source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Grandmother Antonietta’s Mixed-Fruit Jam — Quattro Stagioni
Ingredients
- 1 kg mixed fruit cleaned and prepared
- 700 g granulated sugar
- 1 lemon juice
Equipment
- 3 Quattro Stagioni-style jars clean, heat-safe jars
- Canning funnel optional
- Cold saucer optional gel test
Directions
- Clean and prepare the mixed fruit, removing pits, cores, or damaged portions as appropriate.
- Combine the prepared fruit, granulated sugar, and lemon juice in a nonreactive saucepan.
- Cook while stirring until the fruit breaks down and the mixture reaches a jam consistency. Use a cold-plate gel test if desired.
- Transfer the hot jam to clean heat-safe jars, leaving room for expansion if freezing.
- Because the available source does not provide a validated jar size, headspace, heat-process, or altitude schedule, cool promptly and refrigerate or freeze. Do not store at room temperature.
Recipe Notes
Private Notes
Questions or results?
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Tried this recipe?
Share your results how it turned out.Serving suggestions
After opening, refrigerate the product and use it in ways appropriate to this recipe.
Frequently asked questions
Can I change the recipe?
Do not change safety-critical proportions, jar size, headspace,
What if a jar does not seal?
Follow the cited source’s instructions for an unsealed jar; refrigerate promptly when required.
Comparison and context
Italian mixed-fruit jam from a Quattro Stagioni promotional collaboration, retained with an explicit refrigerator/freezer safety adaptation.
Troubleshooting
Because the available source does not provide a validated jar size, headspace, heat-process, or altitude schedule, cool promptly and refrigerate or freeze. Do not store at room temperature.
Source & provenance
Typical canning season
Season: All Year
Months: January, February, March, April, May, June, July, August, September, October, November, December
How much of the main ingredient should I grow?
Not calculated for an unsafe or untested method
This recipe does not have a reliable garden conversion. Plan a purchase or harvest separately, and do not use garden estimates to alter the tested recipe.
Garden yields vary by cultivar, climate, soil, pests, and care. Always measure the exact prepared ingredient amount required by the tested canning recipe.