Step 2: Stir frequently heat until steaming but not boiling about 5 to 6 minutes

Step 3: Add pinch of sugar taste and season with salt and pepper set to lowest heat to stay warm

Step 4: Butter both sides of each bread slice generously all the way to the edges — unbuttered edges burn

Step 5: Heat separate pan or skillet over medium LOW heat — lower than you think

Step 6: Place first bread slice buttered side down add cheese slices on top place second slice buttered side up

Step 7: Cook 3 full minutes without moving until deeply golden brown on bottom — patience here is everything

Step 8: Flip carefully cook other side 2 to 3 minutes until equally golden and cheese is completely melted

Step 9: Let grilled cheese rest on cutting board 1 minute before slicing

Step 10: Ladle soup into bowls garnish with basil slice grilled cheese diagonally serve immediately for dipping