Roasted Tomato with shallots

2 lbs plum tomatoes 6 garlic cloves , peeled and whole 1/4 medium red onion 1 tablespoon olive oil 1 tablespoon balsamic vinegar 2 sprigs oregano , remove[...]

6 firm tomatoes , peeled and cut in half 3 garlic cloves , peeled and left whole coarse salt , to taste fresh ground black pepper , to taste 2 tablespoons[...]