Mediterranean Baked Chicken

Details

Ingredients

• 2 (8 ounce) skinless, boneless chicken breasts
• salt and ground black pepper to taste
• 1 lemon, juiced, divided
• 1 small yellow onion, roughly chopped
• ¼ cup olive oil
• 2 cloves garlic, diced
• 1 teaspoon dried Greek oregano
• 1 tablespoon olive oil, or as needed
• 1 cup grape tomatoes, halved
• ½ (10 ounce) bag fresh spinach
• ½ cup crumbled feta cheese