Caldo Xóchitl con Flor de Calabaza Squash Blossom Soup

Name: Caldo Xóchitl con Flor de Calabaza (Squash Blossom Soup)
Ingredients: 8 cups chicken stock; 8 bone-in, skinless chicken thighs; 2 cups crumbled queso fresco; 1 cup cooked rice; 8 chipotle chiles in adobo, finely chopped; 4 serrano chiles, stemmed, seeded, and minced; 1⁄2 medium white onion, minced; 1 cup roughly torn squash blossoms (available at melissas.com); 1⁄2 cup minced cilantro leaves