Instant Pot Beef Shawarma

Ingredients

• 2 lbs boneless beef chuck roast, cut in half
• 2 tablespoons ground cumin
• 1 tablespoon kosher salt
• 1 teaspoon ground turmeric
• 1/2 teaspoon ground allspice
• 1/2 teaspoon ground cinnamon
• 1/2 teaspoon ground black pepper
• 1/2 teaspoon ground ginger
• 1/4 teaspoon ground cloves
• 1/4 teaspoon cayenne
• 1/4 cup olive oil
• 3 tablespoons red wine vinegar
• 1 head garlic, cut in half
• 10 pieces pita bread
• 3 plum tomatoes, sliced
• 1 small red onion, sliced
• 1 small cucumber, sliced
• 1/2 bunch flat leaf parsley, chopped
• 1 cup store bought hummus
• 1/4 cup tahini