Ingredients

• Crust
• 1 cup all purpose flour
  
• 1 cup whole wheat flour or spelt flour
  
• 1 tablespoon baking powder
  
• 1 ¹/₂ teaspoons salt
  
• ³/₄ cup butter (1 1/2 sticks)
  
• ¹/₂ cup buttermilk or yogurt
  
• 1 egg
  
• 1 cup grated sharp cheddar cheese
  

• Filling
• 2 pounds tomatoes, cored and sliced
  
• 2 ¹/₂ cups grated sharp cheddar cheese
  
• ¹/₄ cup olive oil
  
• 1 tablespoon balsamic vinegar
  
• 1 shallot, finely choped
  
• 1 teaspoon salt
  
• 1 teaspoon pepper
  
• several sprigs of fresh thyme