1: Preheat the oven to 400°F.
2: Cut the chicken breast into pieces and season with salt, black pepper, and thyme.
3: Chop the broccoli and green beans, and cut the onion into slices.
4: Dice the potatoes and rinse them in cold water.
5: In a large bowl, mix olive oil, lemon zest, lemon juice, Dijon mustard, and the seasonings.
6: Toss the chicken and vegetables in the bowl to coat them with the sauce.
7: Place everything on a baking sheet and bake for about 30 minutes or until cooked through.
8: Serve and enjoy your meal prep dinner.
