In a medium saucepan, add water, lemon rind, Thai sweet chili sauce, salt, chili flakes and bring water to a boil.
Once water is boiling, remove from heat and stir in couscous.
Cover and let sit for 10 minutes.
After 10 minutes, remove cover from couscous and fluff with a fork.
Add couscous to large bowl. Top with chopped pistachios (or nut of choice), grapes, and herb of choice.
Right before serving, toss and taste - adjust to your liking. Sometimes I add in more salt, pepper, red pepper flakes, more chili sauce, or juice from ½ the lemon.
Serve warm or cold and enjoy!