Greek Burgers And Potatoes (Mpiftekia Me Patates)

For The Burger Mixture:

• 1 Kg / 2 lb + 3 oz lean ground beef
• ½  large onion minced
• 3 large garlic cloves coarsely chopped
• 1 large egg
• 6 tablespoons olive oil
• 1 tablespoon red wine vinegar
• 75 grams / 2.6 oz ground breadcrumbs
• 150 ml water
• a handful of parsley
• 1 teaspoon thyme (either fresh or dried)

For Garnish:

• 750 grams / 1 lb + 10 oz potatoes peeled + cut into wedges
• 2 green bell peppers cut into bite-sized squares
• 2 tomatoes cut into bite-sized squares
• 10 tablespoons olive oil
• 1 tablespoon dried oregano
• 2 garlic cloves cut into thick slices
• kosher salt + freshly ground pepper