Fregola is an Italian rolled pasta similar to Israeli couscous, and it's wonderfully toothsome in this salad. If you can't find fregola (or wanted to go gluten free), millet would be a great substitute. Top with a few chunks of good quality tuna packed in olive oil and you've got a nice, hearty, nourishing meal.
I can't tell you how much I love this salad. Butter lettuce has a delicate, sweet crunch to it, and its crevices catch the nubbins in the vinaigrette perfectly. It's crazy simple, and it's the perfect accompaniment to Frittatas, Soft Scrambled Eggs, Simplest Roast Chicken, Crispy Curry Quinoa Cakes ... you name it.