Ingredients

1 teaspoon finely grated lemon zest, plus 4 teaspoons fresh juice

4 teaspoons white balsamic vinegar

1 teaspoon finely chopped shallot

Kosher salt and freshly ground pepper

3/4 cup shelled fresh English peas

1/4 cup mayonnaise

1/4 cup extra-virgin olive oil

10 cups tender spring lettuce, such as Bibb, red leaf, or green leaf, or a combination

4 ounces sliced prosciutto or speck, torn into strips

1 teaspoon poppy seeds

Preparation

In a small bowl, whisk together lemon zest and juice, vinegar, and shallot. Season with salt and pepper; let stand 10 minutes. Meanwhile, cook peas in a small pot of boiling salted water until just tender, about 2 minutes. Drain.

Whisk mayonnaise and oil into vinegar mixture; season to taste. Toss lettuce with half of dressing and divide among plates, along with prosciutto. Toss peas with remaining dressing and mound on top. Sprinkle with poppy seeds; serve immediately.