Very very tasty! Used shrimp instead of crab and cooked them in a bit of butter, garlic, salt, pepper, basil. When done I removed from heat and let the pan cool for a few moments so I wouldn't scorch the sour cream somehow.

When it came time for the sauce, I didn't even need milk, maybe thats because I had set my sour cream out earlier when I started cooking. I thought the sauce needed to be thickened up just hair or two instead of adding milk! I added small amount of cream cheese and more parmesean cheese to thicken it.