Grape tomatoes work really well in this recipe. They're shaped like grapes and a little larger than cherry tomatoes, so they take up a little more room on your skewer. That means you can use less of them and make more skewers (making this more budget-friendly and easier to make more, if you need to feed a crowd). But, if you can only find cherry tomatoes in the store, you can use those. You might just need a few more to fill your skewers. We don't recommend using any other type of tomato. Ones like Roma or Heirloom need to be cut up and the tomatoes will cook quickly without any skin to slow the cooking. The tomatoes will cook quickly compared to the mushrooms and your skewer won't cook evenly or be ready at the same time.