In a food processor, add the cauliflower florets along with the chili powder and ground turmeric.
Pulse a few times until the cauliflower breaks down into fine crumbs.
Remove the blade from the food processor and stir in the sour cream until well combined.
Transfer the cauliflower-sour cream mixture to an 8-inch square pan and spread it evenly.
Spread the salsa over the cauliflower mixture, ensuring it covers the surface evenly.
Sprinkle the grated cheddar cheese over the salsa layer.
Top with thinly sliced green onions and chopped olives, if using.
Refrigerate until ready to serve.
Serve with raw vegetables, crackers, or corn chips.