First cut the bread into slices & toast it evenly

Finely chop all the vegetables. Now Line a baking sheet with foil.

Toss the vegetables in olive oil & drizzle some balsamic vinegar to it. Sprinkle some with salt, pepper, and oregano

Arrange three finely chopped vegetables on the bread slice & grate some mozzarella cheese on the top of it

Place the bread slice on the pan and cook at 218 degrees Celsius until cheese is melted and bread is toasty