Chicken Parmesan Burgers

Ingredients

• 10 1/2-inch-thick slices French bread (4 inches in diameter); 8 slices toasted, 2 slices (crust removed) diced
• 1/2 cup finely grated Parmesan cheese
• 4 tablespoons minced fresh basil, divided, plus 12 large basil leaves
• 3/4 cup purchased refrigerated marinara sauce
• 12 ounces ground chicken (white meat)
• 2 tablespoons extra-virgin olive oil, divided
• 1 tablespoon grated onion
• 1/4 teaspoon salt
• 4 ounces whole-milk mozzarella cheese, thinly sliced
• 4 large radicchio leaves

Preparation

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