Cut the lemon into thin slices and remove the seeds, cut the passion fruit into slices, scoop out the pulp, then put it in a pot, bring to a boil over high heat, then turn to medium heat and simmer until thickened.

The specific method is introduced below for reference. First prepare the materials: passion fruit: about 15 pieces, lemons: 3 pieces, rock sugar: 550g.

1. Soak the lemon in salt water for 10 minutes, then cut into thin slices, remove the seeds with a toothpick and set aside, as shown in the picture.

2. Cut the passion fruit in half, pour out the water, scoop out the pulp and set aside, as shown in the picture.

3. Put all the ingredients into the pot, bring to a boil over high heat, turn to medium heat and simmer, turn off the heat when it thickens slightly, as shown in the picture.

4. Let cool and then put it into a clean, water-free and oil-free glass bottle.