Preheat oven to 400°F (200°C). Line a baking sheet with parchment.
Steam riced cauliflower until tender, about 8 minutes. Drain and press firmly in a clean towel to remove excess moisture.
Mix cauliflower, mozzarella, egg, almond flour, and everything seasoning into a dough.
Form into 12 small rounds, about 1/2 inch thick, and arrange on the baking sheet.
Bake 18–20 minutes, until golden and firm. Cool slightly.
Top each round with a spoonful of cream cheese, a piece of smoked salmon, a few capers, and a sliver of red onion.
Garnish with fresh dill and an extra pinch of everything seasoning before serving.