Peel and finely dice the onions and garlic. Clean, wash and quarter the tomatoes. Wash, dry and chop the oregano. Heat 5 tablespoons of olive oil in a pan. Add tomatoes, onions, garlic and oregano and braise over medium heat for 12-15 minutes, turning several times. In the meantime, pour the beans onto a sieve, rinse briefly with cold water and drain well.
Add the beans and olives and braise for another 4-5 minutes. Season to taste with salt and pepper. Crumble the feta cheese. Drizzle tomato pan with remaining olive oil and sprinkle with cheese. Serve garnished with oregano and basil. Serve with toasted garlic bread