Add the lemon juice, honey, sambal oelek, salt, pepper, and garlic (if using) to a mixing bowl. Whisk well to combine. Taste and adjust to your preference.
Juice of a lemon, 1 teaspoon honey, ½ teaspoon sambal oelek, ¼ teaspoon sea salt, ¼ teaspoon black pepper, 1 clove garlic
Add the onion to the vinaigrette and let it rest while you prepare the mangoes. This will help to make the onion a bit milder.
1 small red onion
Peel and chop the mango into pieces about 1.5 cm (½ in.) in size. Add it and the parsley to the bowl and toss well to coat in the vinaigrette.
2 medium ripe mangoes, 1 handful fresh parsley
Serve immediately, or store in the refrigerator for a maximum of two days. This is best fresh and served at room temperature.
Notes
Adjust the spice: consider this a minimum amount - spicy is right there in the title - and add more sambal oelek if you like more heat. At this level I consider it to be warm but still pleasant for people who have a low spice tolerance, so it could be served to a group.