1 cup AP flour
1½ tsp. baking powder
1½ tsp. sugar
½ tsp. salt
¼ tsp. baking soda
2 tbsp.
cold unsalted butter cut into ¼-inch cubes
¾ cup cold buttermilk
Preheat oven to 450 degrees. In food processor, pulse flour, baking powder, sugar, salt, baking soda to combine. Scatter butter cubes evenly over dry ingredients; pulse until mixture is coarse and pebbly, about eight to 10 1-second pulses. Alternatively this can be done using a pastry blender to cut the butter into the dry ingredients. Transfer mixture to a medium bowl. Add buttermilk to dry ingredients and mix with a rubber spatula until just incorporated. Dough should be very wet and slightly lumpy.
Pour dough into a buttered deep-dish pie plate or 2-qt casserole dish, spreading evenly over the bottom. Bake for 15-20 minutes, or until baked through and golden brown.
Tomato Pie
2-3 pounds fresh tomatoes, sliced about ¼-inch thick
1 large, preferably sweet-variety onion, halved then sliced 1/8-inch thick
½ cup fresh basil torn by hand
2 cups shredded cheddar cheese
1 cup mayonnaise
Salt
Freshly cracked black pepper
Any optional ingredients like goat cheese, mozzarella, sliced fennel, etc
Reduce oven temp to 350 degrees. On top of the baked biscuit crust, layer tomato, onion, basil, optional ingredients, seasoning each layer well with salt and pepper.
In a small bowl, combine shredded cheese, mayonnaise. Season with salt and pepper to taste. Spread cheese mixture over the pie ingredients. Place pie plate or casserole dish on a baking sheet to catch any spills while baking.
Bake approximately 45 minutes, testing doneness with a knife, tomatoes should be softened but with slight firmness remaining. Cool slightly before serving.