Heat a grilling pan with a medium heat and add 2 slices of mutli-grain bread, lightly toast on one side for about 2 minutes, then transfer the slices of bread to a cutting board

To assemble the grilled cheese sandwich, grab one of the slices of bread toasted side up, and add 3 slices of queso Manchego to the bread, then add 2 jarred roasted red bell peppers cut in half on top of the queso Manchego, cut about 8 green Spanish olives in half and place on top of the roasted bell peppers, season with dried oregano and freshly cracked black pepper, then add a handful of arugula and top off with some thin slices of fresh mozzarella, lightly season the mozzarella with sea salt and place the other slice of bread on top, toasted side down, gently push down on the sandwich to make everything compact, then brush the top of the sandwich with some extra virgin Spanish olive oil

Heat the same grilling pan with a LOW heat and add the sandwich oil side down, brush some extra virgin Spanish olive oil on top of the sandwich and place a large bowl on top of the grilling pan, after 4 minutes flip the sandwich and push down on it with a spatula to make it even more compact, place the bowl back on the griling pan and cook for another 4 minutes

Remove the sandwich from the grilling pan and wrap it in foil paper, add the sandwich into a pre-heated oven, bake and broil option 210 C - 410 F between 6 to 7 minutes, remove from the oven, cut in half and place on a dish, garnish with fresh arugula and a couple slices of tomato, serve at once