2 teaspoons fish sauce, or to taste
2 teaspoons freshly squeezed lime juice
1 teaspoon dark brown sugar
1 garlic clove, minced
3 large or 4 medium heirloom tomatoes, sliced 1/4 inch thick
1/2 seedless English cucumber, thinly sliced
2 scallions, thinly sliced
1/2 jalapeño pepper, thinly sliced
2 tablespoons fresh Thai or regular basil, cut into a chiffonade
2 tablespoons chopped fresh cilantro