Heat oven to 500°F. Split pizza dough into two pieces. Stretch each pizza dough into the thinnest possible 6- to 8-inch circle and place onto a baking sheet if they fit onto one, or two smaller baking sheets.
Gently pinch the edges of the circle of pizza dough to make it a little thicker into a raised rim. Brush the dough with olive oil. Sprinkle raised edge with Everything seasoning if using.
Bake pizza doughs 6-8 minutes or according to instructions if using packaged dough, until golden brown. Remove baked pizza crust from oven and let cool on countertop for 5-10 minutes.
Assemble Smoked Salmon Pizza
Spread a thin layer of crème fraîche, yogurt, or cream cheese over the baked pizza crust, leaving the raised edges.
Layer smoked salmon over the crème fraîche. You can lay the salmon slices flat, or ruffle them slightly for a more textured aesthetic.
Opt to Make it Even More Luxe: Add dollops of caviar and salmon roe.
Sprinkle smoked salmon with chopped chives, dill, sliced red onions, and capers if using.