Masala Chicken and Cauliflower Rice Bowl

Name: Masala Chicken and Cauliflower Rice Bowl
Ingredients: 2 tablespoons chopped fresh cilantro; 1 English cucumber, seeded and diced; Lemon wedges, for serving; 2 boneless, skinless chicken breasts (about 12 ounces total); 2 cups plain whole-fat yogurt; 2 tablespoons lemon juice; 3 teaspoons curry powder; 2 teaspoons finely grated ginger; 1 1/2 teaspoons finely grated garlic; Kosher salt; 4 cups bite-size cauliflower florets (about 8 ounces); 3 tablespoons unsalted butter; 2 cups basmati or other long-grain rice; 1/4 cup tomato paste; 4 wide strips lemon zest