I've been making lots of custard (egg + enough cream/coconut milk to fill the cup, whisk together, add a little stevia, vanilla extract, etc., bake in a water bath until just set) and lots of coconut oil bark (melt coconut oil, mix in cocoa powder, stevia, vanilla extract, etc., put in mold in the freezer). Alternatively you can just drink cream and coconut milk, which I also do. I think you almost have to supplement additional fat to have enough calories to stay ketogenic without getting too much protein. Here is an example from Dr. Peter Attia:
What I actually eat « The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.
Keep in mind that Dr. Attia exercises a lot (like 1+ every day) so his calorie needs are pretty high. But it's still good to see an example of someone eating a highly ketogenic diet to know what to shoot for. Notice that he uses cream and butter pretty much every day.