Preheat oven to 400 degrees F. Mix butter, sour cream and salt. Add flour 1 cup at a time, mixing well after each addition. Dough should be soft and slightly oily - should not stick to your fingers. (Do not add too much flour because dough will become tough). Split dough in half.

Knead each piece of dough in your hands, adding a little more flour, and form each piece into a ball.

Using sunflower oil grease 2 large cast iron pans (preferred) or pizza pans and sprinkle each one with 1 teaspoon flour and 1 1/2 tablespoons breadcrumbs.

Spread dough out over surface of pan and form the crust. Sprinkle dough with a little bit of breadcrumbs.

Spread 2 tablespoons ketchup over each pizza (optional) then layer tomato slices side by side - completing covering the pizza. Cook for 5-10 minutes.

Remove from oven and add desired toppings (except for pepperoni), then sprinkle with cheese and a dash of oregano (optional).

Bake for another 35-50 minutes. 10 minutes before pizza is done top with pepperoni slices and put back in the oven to continue to bake.