In a small saucepan over high heat, bring water to a boil. Stir in rice; cover and remove from heat. Let stand covered 5 minutes or until water is absorbed. Fluff with fork.
Slice off the top of each tomato and scoop out the pulp, leaving a 1/4 inch thick shell. Reserve 3 tablespoons of pulp, chopped. Invert the tomatoes to drain.
In a medium bowl combine rice, tomato pulp, green pepper, onion, parsley, salt, garlic and olive oil; mix well. Spoon filling into tomato shells.