LCHF based pure keto (<20g carbs/day) à la: https://www.dietdoctor.com/low-carb/keto

Breakfast looks like lunch, pretty much. I eat it at 12pm when everyone else is eating lunch. Little bit of protein, vegetables / salad (minus starchy, or super sweet), add in extra fats (olive oil, butter, avocado, mayo etc). Perhaps some salty (sea, or himalayan salted nuts). Whenever I can I sub in a piece or two of bacon and/or eggs, but it's hard when at work and eating out with the boys.

I'm usually pretty brutal with the subbing of high carb ingredients with low carb, or at least getting them to take it out completely when I order. Sometimes you get looks but most time the staff are like "whatever".