Fried Egg on Toast with Salted Herb Butter and Radishes

Name: Fried Egg on Toast with Salted Herb Butter and Radishes
Ingredients: 3/4 cup mixed tender herbs (such as parsley, dill, basil, chives, and/or tarragon), plus sprigs for serving; 1/2 cup (1 stick) unsalted butter, room temperature, cut into pieces; 1/2 teaspoon finely grated lemon zest; 2 teaspoons fresh lemon juice, plus more for drizzling; 1 teaspoon kosher salt, plus more; 1/2 teaspoon freshly ground black pepper, plus more; 1/2 cup thinly sliced trimmed mixed radishes; 4 slices of bread, toasted; 4 Olive Oil–Basted Fried Eggs