Caramelized Onion Tarts feature sweet, tender onions slowly cooked in olive oil until golden brown. The onions are spread over a flaky puff pastry base brushed with tangy Dijon mustard and topped with a mixture of crisp bread crumbs, savory Parmesan cheese, and fragrant thyme. Baked until golden, these tarts offer a delightful balance of flavors and textures.

The Caramelized Onion Tarts, with their sweet and savory flavors from the caramelized onions and buttery puff pastry, pair well with a full-bodied Chardonnay. The wine's rich texture and subtle oak notes complement the tart's creamy filling, while its acidity balances the dish's richness. Alternatively, a light-bodied Pinot Noir with its delicate fruit and earthy undertones can enhance the tart's complex flavors.