Preheat your oven to 425°F (220°C) to prepare for roasting the green beans.
In a small bowl, whisk together olive oil, lemon juice, chopped fresh herbs, and minced garlic.
Place the chicken breast on a cutting board and pat dry with paper towels. Season both sides lightly with salt and pepper.
Coat the chicken well with the lemon herb mixture, ensuring every surface is covered.
Arrange the chicken breast on a baking sheet lined with parchment paper.
On a separate baking tray or section of the same sheet, toss the green beans with a drizzle of olive oil, a pinch of salt, and pepper.
Roast the chicken and green beans in the preheated oven. Bake the chicken for about 20-25 minutes until it reaches an internal temperature of 165°F (74°C) and becomes lightly crispy on the edges, and roast the green beans for about 15-20 minutes until tender and slightly charred.
Once done, remove both trays from the oven. Let the chicken rest for a few minutes, then slice if desired.
Serve the crispy lemon herb chicken alongside the roasted green beans, and enjoy a wholesome, nutritious meal.