How to Make It
In a small skillet, cook the garlic in the olive oil over moderately low heat until fragrant and soft, about 5 minutes. Transfer to a blender and let cool. Add the shallot, lemon juice and zest, lime juice and zest, jalapeño, vinegar and wine to the blender and process until smooth. Season with salt and pepper.
Transfer 1 tablespoon of the dressing to a large bowl. Add the Bibb lettuce and toss to coat. Arrange the lettuce on a platter. Add the capon and watercress to the bowl along with the onion, avocado and the remaining dressing and toss. Mound the capon salad over the lettuce and serve right away.