Roasted Spatchcock Chicken : One pan easy comfort dinner!

5lb Whole young chicken
Salt and pepper

Marinade
1 Tbs Italian seasoning
1Tsp Paprika
1/2 Tsp Chili powder
1 Tsp Oregano
2 Tbs Balsamic vinegar
1 Tbs Worcestershire sauce
4 Tbs Olive oil
1 Lemon zested and juiced
2 Tbs Parsley, chopped plus more for garnish

For the vegetables
5 Yukon gold potatoes
1 Yellow onion
2 Medium carrots, peeled , diced medium
15 Brussel sprouts ( about 1/2lb )
1 Lemon, sliced