Preheat the oven to 400°F (200°C).
Pat the chicken breast dry. Lightly season with salt, pepper, and a pinch of dried Italian herbs.
Dredge the chicken in the panko breadcrumbs, pressing gently to help them adhere.
Place the breaded chicken breast on a lined baking sheet.
Wash and dice the small potato into 1-inch cubes. In a bowl, toss with a little olive oil, salt, pepper, and additional dried Italian herbs.
Spread the potatoes on a separate baking sheet.
Place both the chicken and potato sheets in the oven. Bake the chicken for about 20-25 minutes until crispy and cooked through; roast the potatoes for 25-30 minutes until golden and tender, tossing once halfway through.
Meanwhile, in a bowl combine mixed greens, halved cherry tomatoes, and sliced cucumber.
In a small container, mix the lemon juice with the remaining olive oil, a pinch of salt and pepper to create a light vinaigrette.
Once the chicken and potatoes are done, plate them alongside the fresh green salad. Drizzle the salad with the vinaigrette.
Serve immediately and enjoy your balanced, flavorful meal.