Remove the lid and stir in olive oil, garlic, Italian seasoning, and red pepper flakes until fragrant

Continue cooking until the moisture evaporates and the broccoli softens further

Transfer the mixture to a bowl and mix in lemon zest and salt for a fresh finish

Place two slices of bread on a flat surface and sprinkle a layer of cheese evenly over each

Spoon the broccoli mixture over the cheese and spread it evenly

Add more cheese on top to ensure a gooey, melty texture

Cover with the remaining bread slices and gently press down

Heat oil in the skillet and cook the sandwiches until the bread turns golden brown

Flip carefully and cook the other side until the cheese melts completely and the sandwich is crisp