- 2 heads radicchio, halved lengthwise
- 2 heads Belgian endive, halved lengthwise
- 1 head chicory (curly endive), halved lengthwise
- 1 head romaine lettuce, halved lengthwise
- 3 tablespoons olive oil, divided
- 3/4 cup pitted Greek olives
- 1/2 cup capers
- 1 tablespoon dried oregano
- 1 1/2 teaspoons ground thyme
- 1 teaspoon salt
- 1 teaspoon ground black pepper
- 1 teaspoon ground dried chile pepper (optional)
- 2 tablespoons grated Romano cheese (optional)
- Preheat oven to 375 degrees F (190 degrees C). Line a baking dish with parchment paper.
- Place radicchio, Belgian endive, chicory, and romaine lettuce halves in a single layer on the baking sheet. Drizzle 2 tablespoons of the olive oil on top.
- Combine olives and capers in a small bowl. Mix oregano, thyme, salt, black pepper, and chile pepper in a small bowl to make spice mixture.
- Stuff inner leaves with olives, capers, and spice mixture using your fingers. Wrap halves together with kitchen string to prevent stuffing from falling out. Drizzle remaining 1 tablespoon olive oil on top.
- Bake in the preheated oven until crispy and beginning to wilt, 10 to 15 minutes. Cut off kitchen string and sprinkle Romano cheese on top before serving.