Chicken Club Cauliflower Crust Pizza

Name: Chicken Club Cauliflower Crust Pizza
Ingredients: 1 medium head cauliflower, cut into florets; 1 egg, beaten; 1/2 Cup shredded, low-fat mozzarella cheese; 1 Teaspoon dried oregano; 2 Tablespoons dry ranch dressing mix; 1/2 Cup plain, low-fat Greek yogurt; 1/4 Cup regular cream cheese, softened; 1/4 Cup chopped scallions; 6 slices turkey bacon; 1 Cup shredded, low-fat cheddar cheese, divided; 8 Ounces cooked chicken breast, diced; 1 Cup shredded iceberg lettuce; 1/2 Cup diced tomatoes