Grilled Lemon Yogurt Chicken

Ingredients:

1 big chicken
1/2 cup plain Greek yogurt
1/2 lemon, juiced
1 tbsp olive oil
4 cloves garlic
1 tbsp paprika
1 tsp Herbs from Provence (or any dried Italian, or Greek herb blend - rosemary, thyme, oregano, etc.)
1 tsp salt
1 tsp fresh ground black pepper

--Marinade for at least an hour then grill

For the Sauce:
1/2 cup yogurt
1 tbsp lemon juice
1 tsp harissa or other hot sauce
salt and fresh ground black pepper to taste (optional)