Green Chutney Chicken

Name: Green Chutney Chicken
Ingredients: 1 medium bunch cilantro, coarsely chopped (including stems; about 1½ cups); 4 garlic cloves; 1 serrano chile, stem removed; ½ cup (tightly packed) mint leaves; ¼ cup sour cream; 2 Tbsp. yellow mustard; 1 tsp. ground cardamom; 3 Tbsp. extra-virgin olive oil, plus more for drizzling; 1 Tbsp. Diamond Crystal or 1¾ tsp. Morton kosher salt, plus more; 1½ lb. skinless, boneless chicken thighs, cut into 2 pieces; 2 large limes, halved; Sliced cucumber, radishes, and red onion and warmed flour tortillas (for serving; optional)