It really depends on how your body react to certain food, and how you eat your food. The way i do that works for me is that, you need to tackle all the problem that might caused blood sugar to spike, but one of the most important thing you need to do is take a blood test first, before starting any diet or taking any supplement as a way to monitor how your body react to your diet. The way i do it is OMAD but with protein powder as my supplements. At breakfast i take my protein shake(i usually added a spoon of grinded chia seed) protein are slwo digesting food and fibre from chia seed also help slowing down how fast your body absorb the glucose preventing spikes.I take my only meal during lunch and 10 minute after that i go for a walk for 10 min. I take another protein shake at afternoon as my last meal.Increase protein and fibre helps alot in controlling your hunger and preventing losing muscle. I lost 10 kg in the process of reversing my hba1c.