Chicken Tawook Quinoa Bowls

Name: Chicken Tawook Quinoa Bowls
Ingredients: 1/4 cup lemon juice; 1/4 cup vegetable oil; 3/4 cup plain yogurt; 4 cloves garlic (finely chopped); 2 teaspoons tomato paste; 2 teaspoons red wine vinegar; 1 1/2 teaspoons salt; 1 teaspoon dried oregano; 1/4 teaspoon paprika; 1/4 teaspoon ground black pepper; 1/4 teaspoon ground allspice; 2 pounds skinless (boneless chicken breast halves - cut into 2 inch pieces); fresh parsley; 2 cups cooked quinoa; 2 ripe avocado; 1/2 cup homemade Hummus; store bought garlic sauce; sliced Persian cucumbers; 1 head romaine lettuce (shredded); served w/ a side of pita bread; 1/2 cup homemade Tzatziki (optional)