Preheat the oven to 400 degrees*
Shred the smoked salmon with a fork.
Combine the salmon in a bowl with lemon juice, green onion, and capers. Set aside.
Lightly grease the cups of a mini muffin tin.
Press two tater tots into each cup. This works best if you use a round spoon or another object to smush the tater tots into the tin.
Bake according to package instructions, or until the tater tots are golden brown and crispy around the edges.
Remove the tater tots from the oven, and use the spoon to push into the center of the cooked tater tots once again, creating a "cup" shape.
Top each cup with the salmon mixture and a small dollop of sour cream or plain greek yogurt.