Serve this colorful, layered salad in a large glass trifle dish or punch bowl for optimum effect.
In a large glass bowl, layer first ten ingredients.
Whisk together olive oil, balsamic vinegar, mustard, garlic, and oregano.
Drizzle dressing over salad just before serving.
To make this salad a main dish, simply add two more layers to the mix — one layer of diced chicken and one layer of diced ham or salami. Adding a sprinkle of chopped egg or crumbled bacon couldn't hurt.