Green Goddess Chicken Thighs

Name: Green Goddess Chicken Thighs
Ingredients: 4 oil-packed anchovy fillets; 2 garlic cloves, smashed; 3 (heaping) cups mixed tender herbs (such as dill, parsley, cilantro, basil, mint, tarragon, and/or chives), plus more for serving; ¾ cup plain whole-milk yogurt, sour cream, or buttermilk; 3 Tbsp. extra-virgin olive oil, plus more; 2 lemons, divided; Kosher salt, freshly ground pepper; 1½ lb. skinless, boneless chicken thighs, patted dry; 3 medium radishes, trimmed, thinly sliced into rounds