A light and flavorful Caprese sandwich perfect for summer picnics, featuring fresh heirloom tomatoes, creamy mozzarella, and a zesty homemade pesto mayo.
Pat tomatoes dry to prevent soggy bread. Use fresh basil for best flavor. Toast bread lightly if preferred. Assemble close to serving time to keep bread from getting soggy. Pesto mayo can be made up to 2 days ahead and stored refrigerated.
Keywords: Caprese sandwich, pesto mayo, summer picnic, fresh mozzarella, heirloom tomatoes, basil, easy sandwich recipe