Spicy Plum Jam

1 . Stage

Place habanero peppers, chile peppers, and orange slices into a wide shallow saucepan. Add just enough water to cover. Add 1 cup sugar, bring to a simmer, and poach until oranges are translucent and chiles are soft, about 15 minutes.

2 . Stage

Use tongs to remove habanero and chile peppers to a plate. Use latex or nitrile gloves and snip tops off all peppers with a pair of scissors. Cut down the sides of the peppers to remove the seeds; set seeds aside. Snip peppers into small, thin pieces and return to the saucepan with the oranges. Add some (or all) of the seeds, depending on how hot you want it.

3 . Stage

Add plums, remaining 2 3/4 cups sugar, cinnamon sticks, lemon juice, and coriander to the saucepan and bring to a boil. Remove from the heat, transfer to a large ceramic bowl, cover with parchment paper, and let sit 8 hours to overnight.

4 . Stage

Return plum mixture to the saucepan and bring to a simmer. Simmer until jam is set and measures 220 degrees F (105 degrees C) with a sugar thermometer, 30 to 35 minutes.

5 . Stage

Meanwhile, inspect four 8-ounce jars for cracks and rings for rust, discarding any defective ones. Immerse in simmering water until jam is ready. Wash new, unused lids and rings in warm soapy water.

6 . Stage

Pack jam into hot, sterilized jars, filling to within 1/4 inch of the top. Run a clean knife or thin spatula around the insides of the jars to remove any air bubbles. Wipe rims with a moist paper towel to remove any residue. Top with lids and screw rings on tightly.

7 . Stage

Let jars rest upside-down, several inches apart, for 12 to 24 hours. Press the center of each lid with a finger to ensure the lid does not move up or down. Remove the rings for storage and store jam in a cool, dark area.