In a wok, preheat the oil to 375 degrees F.
In a baking dish, toss the shrimp with the Essence and lime juice.
In a bowl, sift together the flour, cornstarch, and salt. Gradually add the water, whisking, until the batter is smooth and thick enough to lightly coat the back of a spoon. Place the shrimp in the batter and toss to coat.
Unroll the kataifi a small amount at a time and cut into lengths the same size as the shrimp, about 4-inches. Spread the cut kataifi flat on a work surface and cover the remaining with a damp towel to keep from drying out. One at a time, lay the shrimp on the cut kataifi and roll to completely wrap inside.
In batches, add to the oil and fry until golden brown, about 2 minutes. Remove and drain on paper towels.
To serve, place the shrimp in the lettuce cups. Drizzle with the Hot and Sour Chili. Serve immediately.
Hot and Sour Chili Sauce:
1 cup Sweet Thai Chili Sauce*
1/4 cup Sriracha hot chili sauce*
2 tablespoons rice wine vinegar
Combine all the ingredients in a bowl and whisk to combine. Serve at room temperature.
Yield: 1 1/4 cups
*available at Asian and gourmet markets, and some supermarkets