mixed tomato salad

We tried the Great Food Fast's Mixed Tomato Salad on the side of our Roasted Tomato Frittata. I blogged about this frittata a few months ago and again, it's a stellar recipe.

The tomato salad on the other hand was good, but not great. I used both roma and beefsteak tomatoes over arugula. I'd really like to use heirloom tomatoes and try this again, but they are very hard to come by. When it comes to simple tomato salads this one, this one or this one are better.