My lunch suggestion would be
" "
Seriously, it would be nothing. If you are able to get your breakfast and dinner dialed in, I think you should find that further food may not be necessary.
If you are relatively new to low carb, you might be doing treats, or just out of habit 3 meals, or maybe just need to get fully fat adapted. Over time may of us find we simply cannot cope with more than 2 meals sittings.
Whole nutrient dense meals lend themselves towards being mentally and physically satiating. I would eat snack options with your meal. So for example I finished my dinner around an hour ago, this consisted of air fried minted lamb (love the crispy bits) and no cook vegetables and for dessert mixed with snack, toasted coconut flakes, pecans, brazil nuts, hazelnuts, walnuts, 100% dark chocolate and a little milk:
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