Recipe: Caramelized Onion Shortbread

Ingredients

• 1.0 tbsp butter
• 1.0 tsp grapeseed oil
• 0.5 whole yellow onion
• 0.25 tsp salt
• 1.0 tbsp sugar
• 1.0 tbsp red wine vinegar
• 0.25 cup icing sugar
• 2.0 tsp thyme leafe
• 3.0 cup flour
• 1.0 tbsp pumpkin seed
• 1.0 tbsp sesame seed
• 1.0 tbsp poppy seed
• 1.0 whole egg white
• 1.0 tbsp water