Preheat your oven to 400°F.
Drain and rinse the chickpeas, then pat them completely dry with a paper towel to ensure they get crunchy.
Toss the chickpeas with a half teaspoon of olive oil and half of the dried oregano, then spread them in a single layer on a baking sheet.
Roast the chickpeas for 20-25 minutes until they are golden brown and crisp.
Season the chicken breast with salt, pepper, and the remaining oregano.
Grill the chicken over medium-high heat for about 6 minutes per side until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing it into thin strips.
Chop the romaine lettuce, halve the cherry tomatoes, and slice the cucumber.
In a small bowl, whisk together the remaining olive oil and the lemon juice to create a light vinaigrette.
Combine the greens and vegetables in a large bowl, toss with the vinaigrette, and top with the sliced chicken and roasted chickpeas.