Roasted Tomato and Red Onion Salad

1 1/4 lbs ripe tomatoes 1 red onion 1 red bell pepper 3 cups vegetable stock (or 3 cups water plus 1/2 vegetable bouillon cube) 1 tablespoon olive oil 4 -8[...]

3 red onions , roughly chopped 1 teaspoon olive oil 3 sprigs thyme 10 ounces cherry tomatoes , halved 2 tablespoons balsamic vinegar 3 ounces salad leaves 2[...]