Fresh Stir Fry Melange

Ingredients

• 3 1/2 cups fresh green pepper strips
• 3 1/2 cups fresh red pepper strips
• 2 1/2 cups mushrooms, sliced
• 1 cup celery, sliced
• 2 tablespoons onion, chopped
• 1/2 clove garlic, crushed
• 1/2 teaspoon sugar
• 1/4 teaspoon dried leaf oregano
• 3/4 teaspoon salt
• dash of pepper
• 1/4 cup olive oil
• 1 teaspoon wine vinegar
• 2 tomatoes, cut in wedges