Place damp spinach in a saucepan, cover and cook until wilted. Drain and squeeze to remove excess water. Heat oil in a large skillet, saute onion at low heat until golden, add garlic and saute briefly, then add spinach, and cook for a minute or two more. Let cool.
In a bowl, smooth soy yogurt and add spinach mixture. Season with salt and pepper. Serve cold with crisp hot bread or naan.