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Crostini platter with a jar of blueberry-onion jam

Savoury Blueberry-Onion Jam

  • Author: Isabelle Boucher
  • Total Time: 55 minutes
  • Yield: 3 cups 1x


This sweet-and-tangy condiment is the perfect accompaniment for a fancy cheese platter, or for spooning onto grilled fish, chicken or pork.


  • 3 cups diced red onion
  • 2 tbsp olive oil
  • 1 tbsp finely chopped fresh sage
  • 1/2 tsp salt
  • 1/2 tsp fresh ground black pepper
  • 3 cups fresh blueberries
  • 1/4 cup balsamic vinegar
  • 1/4 cup cider vinegar
  • 1/4 cup sugar


In a large heavy-bottomed pan set over medium heat, saute the onions in olive oil, stirring frequently, for 10-15 minutes or until the onions are very soft and golden-brown. Add the sage, salt and pepper, and continue sauteeing for another 2 minutes.

Stir in the blueberries, balsamic, cider vinegar and sugar. Bring to a simmer, then reduce heat to low and cook for 20 minutes or until the mixture starts to thicken and coats the back of a spoon. Remove from heat and spoon into 3 sterilized 250ml jars.

Jam will keep in the fridge for 3-4 weeks. For longer storage, process in a boiling water bath for 10 minutes and store in a cool, dark place for up to 6 months.

  • Prep Time: 15 mins
  • Cook Time: 40 mins
  • Category: Condiments
  • Method: Stovetop
  • Cuisine: Canadian