In a deep fryer or large skillet, heat the oil over moderate heat to 350 degrees F.
With a sharp knife, cut the ends from each plantain and score the skins lengthwise several times to peel away the skin. Cut the plantains into 1 1/2-inch thick slices. In batches, fry the plantain pieces until just golden, about 2 minutes per side. Transfer with tongs to paper towels to drain.
Place a plantain slice on a flat work surface, and press down on it firmly with the back of a heavy plate or skillet until flattened to about 1/4-inch thick. Repeat with the remaining slices.
Reheat the oil and fry the tostones to a deeper color and warmed through, about 1 minute. Drain on paper towels and season with salt and Essence. Serve hot.
Combine all ingredients thoroughly and store in an airtight jar or container.
Yield: about 2/3 cup
Recipe from New New Orleans Cooking by Emeril Lagasse and Jessie Tirsch, Published by William and Morrow, 1993.