Avocado Grilled Cheese

Place the medium Hass avocado on the bamboo cutting board. Use the paring knife to slice the avocado in half lengthwise around the pit, twist to separate the two halves, tap the pit gently with the knife blade to loosen and remove it, then scoop the soft flesh into the small stainless steel mixing bowl. Squeeze 1 teaspoon of fresh lime juice over the avocado, add 1/8 teaspoon flaky sea salt and all of the black pepper, then mash lightly with the stainless steel fork—leave 5-10mm sized chunky pieces for texture, do not overmix into a smooth puree. Stir in red pepper flakes now if using.

Lay all 4 sourdough slices flat on the bamboo cutting board. Use the stainless steel butter knife to spread 3/8 tablespoon (about 1.1 tsp) of softened unsalted butter evenly across one entire side of each bread slice, making sure to cover all the way to the crust edges to prevent uneven, patchy browning. The butter should be spread thin enough that no thick clumps remain, creating a uniform coating that will crisp into a golden crust.

Flip two of the bread slices over so the buttered side faces down on the cutting board. Layer half of the sliced sharp white cheddar (20g per sandwich) evenly across each unbuttered bread surface, spreading cheese all the way to the edges to create a melted cheese 'seal' when cooked. Spoon half of the chunky seasoned avocado over the cheese on each slice, spreading it in an even 1cm thick layer, then top with the remaining 20g of cheddar per sandwich. Place the remaining two bread slices on top, buttered side facing out, to form two complete, evenly stuffed sandwiches.

Place the 10-inch matte charcoal nonstick skillet on the stovetop over medium-low heat (325°F / 160°C for electric ranges). Let the pan preheat for 2 full minutes—do not use high heat, as this will burn the bread before the cheese fully melts. Test the pan temperature by sprinkling a single drop of cold water: it should sizzle gently and dance slowly across the pan surface, not evaporate instantly with a loud crackle.

Carefully lift one assembled sandwich with the silicone spatula and place it in the center of the preheated skillet. Cook for 3 to 4 minutes, without pressing down on the sandwich, until the bottom bread is a deep, even golden brown and the cheese closest to the pan has started to melt and bubble slightly around the sandwich edges. Do not move the sandwich around the pan as it cooks to ensure even, consistent crisping across the entire bread surface.

Slide the silicone spatula fully under the center of the half-cooked sandwich, lift gently, and flip it in one smooth motion to cook the second side. Cook for another 3 to 4 minutes, until the second side is equally golden brown and crisp, and all the cheese in the center is fully melted—you will see thin trickles of melted cheese oozing from the sandwich edges when it is ready. Transfer the cooked sandwich to the cream white ceramic plate, then repeat the cooking process with the second sandwich, adding no extra butter to the pan.

Once the second sandwich is cooked, transfer it to the cream white plate next to the first sandwich. Use the serrated bread knife to cut each sandwich diagonally into two equal triangular halves, wiping the knife blade on the edge of the linen towel between cuts if melted cheese sticks to it. Let the sandwiches rest for 1 full minute before serving to allow the cheese to set slightly, so it does not run out completely when you take the first bite. Garnish with a tiny basil leaf and extra pinch of flaky salt if desired.