Use an oven-proof caserole dish of any size. I enjoy using a 9x13 pan and getting in about 4-6 cups of tomatoes. Adjust as necessary (smaller pan, less tomatoes), or even double the pan and double the tomatoes.
Simply gather enough cherry tomatoes so they lay in a single layer. Feel free to use any shape of cherry tomato: small, medium, yellow pear tomatoes, anything you have. If you have some medium sized tomatoes (like I did), you can quarter then and add them in also. Just get them all in one layer for the pan you're using.
Pierce all tomatoes with a knife so they don't pop in the oven. If your tomatoes are a bit on the bigger cherry size, quarter them.
Drizzle with a little olive oil (very optional ~ you can make this completely fat free), and throw in the garlic.
Add a few sprigs of thyme, oregano, and/or basil, salt, and pepper.
Roast at 375 degrees for about 40 minutes, until the tomato skins have broken and released some juices.
Let cool, remove the herbs, and process in a food processor. I like to add a pinch or two of chili flakes at this point. I also pulse mine so it remains relatively chunky, but you can go all the way and make it smooth. Taste for seasoning and adjust.