Apple, Cheddar & Onion Galette

Ingredients

• 1 Stemilt apple
• 1 large yellow onion, sliced thin
• 3/4 cup shredded cheddar cheese
• 3/4 cup all-purpose flour
• 1/4 cup whole wheat flour
• 1/2 tsp sea salt
• 6 tbsp cold, unsalted butter
• 1/2 tbsp extra virgin olive oil
• 2-4 tbsp ice water
• Salt and black pepper to taste