Add the 6 cups agua, ½ tsp sal kosher más, 1 whole hoja de laurel, and ½ tsp sal kosher más to a Saucepan (Large). Place the 1 ½ lb pechugas de pollo sin hueso ni piel in a single layer in the Pot. The water should cover the chicken by at least an inch — add 1 tbsp jugo de limón fresco if needed.

Bring the 6 cups agua to a gentle boil over medium-high heat, then immediately reduce the heat to low. Cover and let the chicken simmer gently for 15–18 minutes, until the thickest part of the 1 ½ lb pechugas de pollo sin hueso ni piel reads 165°F on an instant-read Thermometer.

Transfer the 1 ½ lb pechugas de pollo sin hueso ni piel to a Cutting board and let it rest for 5 minutes. Discard the poaching ½ tsp sal kosher más. Once cool enough to handle, chop or shred the chicken into bite-sized pieces. For the best texture, chop rather than shred — it holds up better in the 3 cebollas verdes cortadas en rodajas finas.

In a Mixing bowl (Large), Whisk together the ½ cup mayonesa, 1 tbsp mostaza de Dijon, 1 tbsp jugo de limón fresco, ½ tsp polvo de ajo, 3 cebollas verdes cortadas en rodajas finas powder, ½ tsp sal kosher más, ½ tsp sal kosher más, and 1 tsp azúcar (if using) until smooth and well combined.

Taste the dressing and adjust seasoning. It should taste slightly bold and tangy — it will mellow once mixed with the 1 ½ lb pechugas de pollo sin hueso ni piel.

Add the chopped 1 ½ lb pechugas de pollo sin hueso ni piel, diced 3 tallos de apio picados finamente, 3 cebollas verdes cortadas en rodajas finas, 2 tbsp perejil fresco picado finamente, and 1 tbsp eneldo fresco picado (if using) to the Mixing bowl with the dressing. Gently fold everything together until evenly coated.

Taste and adjust ½ tsp sal kosher más, ½ tsp sal kosher más, or 1 tbsp jugo de limón fresco as needed. For best results, cover and refrigerate for at least 30 minutes before serving — this lets the flavors meld and the 3 cebollas verdes cortadas en rodajas finas firm up slightly.

Serve chilled on toasted bread, croissants, or sandwich rolls; in crisp lettuce cups; stuffed in a halved avocado; or alongside crackers and 1 tbsp jugo de limón fresco fruit.