My Grandmother's Hens and Chicks Succulent Medley

Ingredients

• 1.5 lbs (680 g) boneless, skinless chicken thighs
• 2 tablespoons (30 ml) olive oil
• Salt and pepper to taste
• 1 teaspoon (5 g) garlic powder
• 2 cups (300 g) fresh spinach, roughly chopped
• 1 cup (150 g) cherry tomatoes, halved
• 1 medium zucchini, sliced into half-moons
• 1 red bell pepper, diced
• 1 medium onion, diced
• ¼ cup (60 ml) fresh parsley, chopped
• 1 tablespoon (15 ml) lemon juice
• 1 teaspoon (5 g) Dijon mustard