CUT 1/2-inch slices from middle of bread loaf; BRUSH both sides of each slice with oil.
COVER half the bread slices with the feta, then with tomato; SEASON with oregano, pepper and salt.
COMPLETE sandwiches by topping with remaining bread.
In a non-stick skillet, HEAT 1 tablespoon of olive oil over moderate heat until hot (but not smoking); COOK sandwiches until golden, about 2 minutes on each side.
May use any of a variety of breads with firm crusts and of good size; original recipe suggests a "round loaf of crusty bread."
Per Serving (excluding unknown items): 3069 Calories; 90g Fat (26.6% calories from fat); 96g Protein; 461g Carbohydrate; 25g Dietary Fiber; 101mg Cholesterol; 6570mg Sodium. Exchanges: 30 Grain(Starch); 2 1/2 Lean Meat; 1/2 Vegetable; 15 1/2 Fat.