Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           mushrooms -- thinly sliced
   2      large         tomatoes -- thickly sliced
     1/2  cup           yellow pear tomatoes -- halved
     1/2  cup           cherry tomatoes. halved
   2      tablespoons   balsamic vinegar
   1      teaspoon      sugar
   1      teaspoon      prepared mustard
   2      tablespoons   basil -- minced
   2      teaspoons     cider vinegar
     1/4  teaspoon      salt
     1/4  teaspoon      pepper

Preparation:

Layer mushrooms and sliced tomatoes down the centre of a large platter. Ring with the halved yellow and cherry tomatoes. In a small bowl, whisk together the remaining ingredients and drizzle this over the tomatoes. Cover and marinate at room temperature for 30 minutes.