Best Tomato Galette Recipe - How to Make Tomato Galette

Ingredients

• 1 1/2 c. all-purpose flour
• 1 1/2 tsp. kosher salt
• 1 tsp.  dried oregano
• 1 tsp. granulated sugar
• 1/2 c. (1 stick) butter, cold, cut into 1/2" pieces
• 4 tbsp. ice water
• 1 1/2 tsp. apple cider vinegar
• 1 large egg, lightly beaten 
• Flaky sea salt
• 1 lb. mixed tomatoes, thinly sliced
• Kosher salt
• 1 tbsp. extra-virgin olive oil
• 2 cloves garlic, thinly sliced
• 2 tsp. fresh thyme leaves 
• 1/3 c.  ricotta, preferably whole milk
• Freshly sliced basil, for serving