To make sauce, combine lime juice and Knorr® Chicken flavor Bouillon in microwave-safe cup and microwave at HIGH 20 seconds or until very hot. Add to food processor along with Hellmann's® or Best Foods® Real Mayonnaise, garlic and cilantro and process until smooth; transfer to small bowl and set aside.
Heat about 1 cup oil in large deep skillet and fry plantains, turning occasionally, until light golden, about 2 minutes. Drain on paper towels. Flatten plantains to 1/3-inch thick using plate or tostonera.
Heat oil and fry plantains again until crisp, about 3 minutes. Drain on paper towels. Serve with sauce.