Preheat the oven to 190 ° C (375 ° F).
Open the buns in half. Top each half loaf with meat sauce, cheese and peppers.
Place the croque-monsieur on a baking sheet lined with parchment paper. Bake 8 to 10 minutes.
Set the oven to the “broil” position and continue cooking for 1 to 2 minutes, until the cheese is golden.
When ready to serve, garnish with basil.