Cut bread in circle
Slightly toast it on a pan
Take it out in a plate
In a wok heat one spoon butter and toss the veggies
Mix cornflour in one cup water and mix it nicely so that no lumps formed
Add this slurry in the veggies, add salt and pepper also mix it becomes thick consistency
Apply sauce on a bread and spread the veggies paste on it spread lots of cheese and oregano on it
Apply butter on a pan and toast it till the cheese melt do it on low flame