I make my own granola, put lots of nuts, seeds, dried fruit etc in it with a small amount of oats.I have it with almond milk. Really nice when it just comes out of the oven eaten warm, it only takes 10 mins to make.
For lunches, I often make soups, you can put anything you like in a soup including meat, add a bit of double cream at the end to improve the taste and even some grated cheese on top. Or tuna mayo salad/prawn salad with full fat mayo.
I have recently discovered fathead dough pizza - it’s basically cheese and more cheese! Toppings can be whatever you like.
If you eat rice, even the barenaked rice then it can be egg fried to add extra cals. I make cauliflower rice and add an egg to make it egg fried, it just changes the taste enough to make it a bit different?
I also use coconut oil quite a bit which just gives a different flavour?