How to Make It
Preheat the oven to 375°F, with a rack in the center position. Grease a 9-inch pie dish with butter or cooking spray.
Arrange the sliced radishes in an even layer in the prepared pie dish and scatter the scallions and a handful of reserved radish tops (roughly chop them, if they’re very large) on top.
In a large bowl, whisk together the eggs and a generous pinch each of salt and pepper. Stir in the ricotta and carefully pour the egg mixture on top of the radishes, being sure it reaches the edges of the pie dish.
Scatter the goat cheese around the pan, and sprinkle the tarragon and chives on top.
Transfer the pie dish to the oven and bake until completely set in the center and beginning to brown at the edges, 25 to 30 minutes.
Allow to cool before slicing into wedges. Serve warm or at room temperature.