Ingredients
4 whole garlic bulbs1 teaspoon canola oil1/4 cup butter, cubed5 cups chopped sweet onions (1-1/2 pounds)3/4 cup cider vinegar1/2 cup bottled lemon juice1/4 cup balsamic vinegar1-1/2 teaspoons ground mustard1 teaspoon salt3/4 teaspoon white pepper1/2 teaspoon ground ginger1/4 teaspoon ground cloves6 cups sugar1 pouch (3 ounces) liquid fruit pectin
Preparation
Preheat oven to 425°. Remove papery outer skin from garlic (do not peel or separate cloves). Cut top off garlic bulbs; brush with oil. Wrap each bulb in heavy-duty foil. Place on a baking sheet. Bake until softened, 30-35 minutes. Cool 10-15 minutes.
In a Dutch oven, heat butter over medium heat. Add onions; cook and stir until softened, 6-8 minutes. Reduce heat to medium-low; cook until deep golden brown, 30-40 minutes, stirring occasionally.
Squeeze softened garlic into Dutch oven. Stir in cider vinegar, lemon juice, balsamic vinegar, mustard, salt, pepper, ginger and cloves. Bring to a rolling boil. Gradually stir in sugar. Return to a boil for 3 minutes. Stir in pectin. Continue to boil 1 minute, stirring constantly.
Remove from heat; let stand for 3 minutes. Skim off foam. Ladle hot mixture into 3 hot half-pint jars, leaving 1/4-in. headspace. Remove air bubbles and adjust headspace, if necessary, by adding hot mixture. Wipe rims. Center lids on jars; screw on bands until fingertip tight.
Place jars into canner with simmering water, ensuring that they are completely covered with water. Bring to a boil; process for 10 minutes. Remove jars and cool.
