I'm not afraid of carbs, so my usual bread replacement is potato or sweet potato. My usual lunch is a potato & meat & fruit. I'd probably add broccoli or something to that if I weren't lazy/cheap. I'm also not afraid of oil/butter/salt, so it's not hard to make the veggies taste good.

Ideal breakfast for me is eggs & meat & perhaps fruit, though I currently have only black coffee for breakfast on weekdays (mild intermittent fasting).

I might add that feeling "full" at meals has been a huge motivator for me. Skipping breakfast and not placing limits on what I eat otherwise so long as it's real food has worked extremely well psychologically; I don't feel deprived, and I can see myself continuing this for life.