Brush a pan large enough to fit everything in 1 layer with olive oil.
In a large bowl, toss the bread cubes with the olive oil, oregano, mint, salt and pepper until all cubes have been coated.
Add the tomatoes and toss gently. Sprinkle the feta over the mixture and toss some more.
Empty mixture in the pan. Bake for 25-30 minutes until bread is crunchy. Tap bread with knife to check. Empty in serving dish, scraping off any dried parts with a wooden spatula.