Best Oven Baked Chicken with Asparagus

Name: Best Oven Baked Chicken with Asparagus
Cuisine: American
Ingredients: 8 chicken thighs, skinless and boneless; 1 tablespoon olive oil; 1 stick (114g) butter, diced; 2 – 3 bunches asparagus (35-40 spears), rinsed and trimmed; Juice of one lemon; 1 lemon, sliced to garnish; The seasoning mix; 1 teaspoon paprika; 1 teaspoon dried oregano (or thyme, or other herbs of choice); 1/4 teaspoon garlic powder; 1/4 teaspoon onion powder; 1/2 teaspoon salt (or chicken bouillon); 1/2 teaspoon fresh cracked pepper