Chicken Gyros - Instant Pot

Ingredients

• 3 lbs boneless, skinless chicken breasts, trimmed of excess fat (you can use frozen or thawed)
• 2 cups onion, thinly sliced
• 9 garlic cloves (9 tsp.), minced
• 2 Tbsp. olive oil
• 1 Tbsp. dried oregano
• 1/4 tsp. allspice, ground
• 1 Tbsp. lemon pepper seasoning
• 2 Tbsp. lemon juice
• 1/4 cup red wine vinegar
• 1/4 cup lower sodium chicken or vegetable broth
• 8 whole wheat pita bread (We used Joseph's Flax, Oat Bran & Whole Wheat Pita Bread.)
• 4 cups fresh spinach
• 8 oz. grape tomatoes, sliced
• 1 container (5 oz.) fat free feta cheese crumbles