Good olive oil
1 small French bread or boule, cut into 1-inch cubes (6 cups)
Kosher salt
1 hothouse cucumber, unpeeled, seeded, and sliced 1/4-inch thick
1 red bell pepper, large diced
1 yellow bell pepper, large diced
1 pint cherry or grape tomatoes, halved
1/2 red onion, sliced in half rounds
1/2 pound feta cheese, cut in 1/2-inch cubes
1/2 cup calamata olives, pitted
2 cloves garlic, minced
1 teaspoon dried oregano
1/2 teaspoon Dijon mustard
1/4 cup good red wine vinegar
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
1/2 cup good olive oil