INGREDIENTS
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1 cup balsamic vinegar
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1 teaspoon sugar
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2 large sub buns
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3 Tablespoons olive oil, divided
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2 large chicken breasts, cut into 1 inch cubes
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4 ounces fresh mozzarella, sliced
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4 tomatoes, chopped
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2 cloves garlic, minced
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1 bunch fresh basil leaves, roughly chopped
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Salt and Pepper