The sandwich you know and adore is no longer just for kids. Elemental in its construction and primal in its comfort, grilled cheese is the sandwich that's as easy to make as it is to love. The American-single-on-white version, with its soft melted cheese, golden-brown crust, and irresistible buttery warmth, is the delicious classic. But grilled cheese also knows how to take a sophisticated turn. Here are 10 grown-up versions that use the iconic sandwich as a blank canvas for orphan morsels of every kind in your fridge.

With Gruyere cheese and layers of prosciutto, arugula, and tomato, this sandwich is a merger of grilled cheese and a BLT.

A new use for that jar of harissa, this sandwich benefits from the appealing fusion of sweetness and spice.

Crisp apple combined with a creamy, nutty Gruyere balances the earthiness of sage and rye.

Dijon mustard and black pepper cut through the saltiness and fattiness of the avocado and bacon.

With its peppery finish, this combo is reminiscent of a Reuben sandwich.

A little heat from the jalapeno goes a long way, and the cilantro adds brightness.

The king of melting cheeses can handle the flavor explosion from the sardines and the peppers.

Creamy cheddar meets tangy cherry preserves and the fresh taste of basil.

A full-flavored tuna melt with hints of sweetness.

A dose of acidity from the pickles is the perfect complement to bacon and cheddar.