Panzanella (Italian Bread Salad)

Ingredients

• 1 1/2 cups stale bread (cut into 1" cubes)
• 1/4 cup extra-virgin olive oil
• 1 pound ripe tomatoes (chopped into bite-sized pieces)
• 1/4 red onion (or 1 shallot, thinly sliced)
• 1 small cucumber (chopped)
• 1/2 cup packed fresh basil (chopped)
• 1/4 tablespoons extra-virgin olive oil
• 1 tablespoon red wine vinegar
• 1 clove fresh garlic (minced)
• 1 teaspoon Dijon mustard
• 1/2 teaspoon sea salt
• 1/4 - 1/2 teaspoon red pepper flakes (optional)