In a mixing bowl or plastic bag combine all of the ingredients.
Mix well and place onto a baking pan. Place into the oven and bake for 20 minutes at 400 degrees.
To Serve:
Serve the roasted tomatoes and onions as a side dish or over pasta for a main entrée.
Notes
Invent Your Recipe:For additional flavor you can add some herbs, such as oregano, thyme, or rosemary. I decided to keep this recipe simple because I love the flavor of tomatoes and red onions on their own. Cherry or grape tomatoes work well in this dish, and I especially like the little "pop" of the tomato when you bite into it. However, I have made this recipe with cut-up plum, or slicing tomatoes, as well.