Ingredients

• 2 tablespoons butter
• 1 pound sea scallops, rinsed and drained
• 1 small onion, finely chopped
• 1/2 pound mushrooms, thinly sliced
• 1 clove garlic, minced
• 2 medium tomatoes, peeled and chopped
• 1/4 cup dry white wine (optional)
• 2 tablespoons ketchup
• 1/2 teaspoon salt
• 1/2 teaspoon chopped dried tarragon
• 1/4 teaspoon dried rosemary
• 1 pinch white pepper
• 1/4 pound frozen, small, cooked shrimp
• 2 teaspoons white wine vinegar
• chopped fresh parsley, for garnish