Make a batch of Basil Walnut Pesto (see link in notes, this takes about 5-10 minutes) You will need half of it for this recipe. Refrigerate the other half and make something else delicious with it (I love to eat it with eggs!!!)
In a large bowl, gently toss together the lettuce, fennel, cucumber, olive oil, lemon juice, salt, and a few grinds of black pepper.
Divide the salad into two serving bowls and garnish with the peaches, nuts, herbs, and a dollop of pesto.