Cheesy Tomato Pie | Real California Milk

Ingredients

• 1 3/4 cups all-purpose flour
• 1 1/2 cups finely grated Real California dry Jack cheese, divided
• 1/4 teaspoon kosher salt
• 3/4 cup cold Real California unsalted butter, cut into 1/2 inch cubes
• 1/4 cup ice water, plus more as needed
• 1 large egg white
• 5 large heirloom tomatoes, thickly sliced
• Salt, as needed
• 2 tablespoons Real California unsalted butter
• 1 sweet onion, thinly sliced
• 2 cloves garlic, minced
• 1/2 teaspoon salt
• 1/2 teaspoon freshly ground black pepper
• 1 cup Real California mascarpone cheese
• 1 cup Real California grated mozzarella cheese
• 1 large egg
• 1 large egg yolk