Tropical Cucumber Salad

3-5 tsp. fish sauce
1 tsp. freshly grated lime zest, plus more for garnish
2 Tbsp. lime juice
1 Tbsp. olive oil
2 tsp. Stevea brown sugar
1 tsp. rice vinegar
¼ tsp. crushed red pepper
1 medium English cucumber, cut into 3/4” dice
1 avocado, but into 3/4” dice
1 mango, cut into 3/4 “ dice
¼ cup chopped fresh cilantro

Whisk fish sauce to taste, lime zest, lime juice, oil, Stevea brown sugar, vinegar and crushed red pepper in a large bowl until combined.  Add cucumber, avocado, mango and cilantro; gently toss to coat.  Serve garnished with lime zest, if desired.