Preheat an oven to 375F. Place the torn bread on a baking sheet and drizzle with 2 tablespoons of the olive oil. Toss together and season with salt. Bake in the oven until crisp and light golden, 10 minutes.
Warm 2 tablespoons of the olive oil in a small frying pan over medium high heat. Add the capers and cook until light golden and crisp, 2 to 3 minutes. Remove with a slotted spoon and place on a paper towel to drain.
In a bowl, combine the remaining 1/3 cup of the olive oil and red wine vinegar. Season with salt and pepper.
In a bowl, gently combine the tomatoes, cucumbers, peppers, olives, red onions and caper leaves, oregano, purslane and toasted bread. Drizzle the dressing over the top and toss gently. Place the slab of feta onto the top, garnish the feta and the top of the salad with friend capers and serve.