Bursting Cherry Tomato Panzanella

Ingredients

• 8 ounces French bread
• 1/4 teaspoon kosher salt
• 1/2 cup thinly sliced red onion
• 1 15.5-oz can Great Northern beans
• 1/4 teaspoon black pepper
• 2 teaspoons red wine vinegar
• 1 pound cherry tomatoes
• 1/2 cup chopped fresh basil leaves
• ½ cup feta cheese
• 5 tablespoons extra-virgin olive oil