Ingredients
Instructions
- Saute onion in 2 Tbsp butter in a small skillet until tender. Remove from heat; stir in mustard and Worcestershire sauce. Spread over cut sides of tomatoes.
- Combine remaining ingredients, tossing lightly. Sprinkle evenly over tomatoes.
- Place tomato halves in a 12 x 8 x 2 inch baking dish. bake at 350 degrees F. for 10 to 12 minutes.
- Serve warm.