Preheat your oven to 400°F.
Drain and rinse the chickpeas, then pat them completely dry with a paper towel.
Toss the chickpeas with 1 teaspoon of olive oil and half of the dried oregano on a baking sheet.
Roast the chickpeas for 20-25 minutes until they are golden and crisp.
Season the turkey breast with salt, pepper, and the remaining dried oregano.
Grill the turkey over medium-high heat for 5-6 minutes per side until cooked through to 165°F.
Let the turkey rest for 5 minutes before slicing it into thin strips.
In a small bowl, whisk together the remaining 1.5 teaspoons of olive oil, lemon juice, and Dijon mustard.
Combine the mixed greens, sliced cucumber, and cherry tomatoes in a large salad bowl.
Toss the salad with the dressing, then top with the sliced turkey and the warm, crunchy chickpeas.