I found the recipe a few years back and have modified it a little. Here is what you'll need:
6-8 small plum tomatoes (mine fit into a 1/4 cup measure)
1 pound bacon cooked and crumbled
1 cup fresh parsley chopped
1/3 cup green onions chopped
1/4 cup grated Parmesan cheese
1 cup Mayo or Salad dressing
Cut a thin slice off the top of each tomato. Scoop out pulp and discard. Invert tomatoes to drain. Combine remaining ingredients in a small bowl. Spoon into tomatoes.