How to Make It
Combine first 4 ingredients in a bowl, stirring well. Add radishes and oregano; toss to coat. Place 1 cup spinach on each of 4 plates. Using a slotted spoon, top each plate with 1/2 cup radishes. Sprinkle each serving with 2 tablespoons cheese and 1/8 teaspoon pepper. Drizzle remaining dressing evenly over salads.