While the chutney is cooking, fill a large pot of water, about ¾ full. Place 4 half-pint jars (see Note 1 below) and 1 quarter-pint jar (see Note 2 below), upright, into the water. Ensure the jars are fully submerged, each jar filled with water, and that the water is at least an inch over the tops of the jars. Cover, bring to a boil, and boil for 10 minutes. Turn off heat and leave the jars in the hot water while the chutney finishes cooking.
Yield: Apx. 4½ cups (4 half-pint jars and 1 quarter-pint jar)
Note 1: You may want to sterilize an additional half-pint jar to have it ready to fill in case the recipe yields more than exactly 4½ cups of chutney. Many factors can vary the amount of chutney produced – e.g., amount of water in the rhubarb, ripeness of the mango, temperature at which the chutney was cooked, how long it was simmered, how much it was stirred during the cooking process, and how much liquid in the chutney may have evaporated, or not.
Note 2: I generally do not process the tiny quarter-pint jar in the hot water bath because it does not need the full 10 minutes that the half-pint jars require and I prefer not to take the cover off the canner to extract the small half-cup jar mid-way through the timing of the hot water bath. Instead, I let the small jar cool at room temperature then refrigerate it and eat its contents within a day or so because it’s hard not to taste freshly-made chutney! I call this my “tasting jar”.