Chicken Burrito with Brown Rice

Name: Chicken Burrito with Brown Rice
Ingredients: 2 tablespoons extra-virgin olive oil; 1/2 medium onion, diced; 2 cloves garlic, minced or crushed; 1 pound boneless skinless chicken breast, cut into bite-size pieces; 2 teaspoons Worcestershire sauce; 1 teaspoon fresh lime juice; 1/2 teaspoon smoked paprika; 1/2 teaspoon ground cumin; 1/2 teaspoon kosher salt, or to taste; Fresh cracked black pepper, to taste; 2 cups cooked brown rice; 4 large flour tortillas, warmed; Black beans and grated cheese (optional); Salsa, guacamole and sour cream, for serving (optional)