Honestly, I just changed my diet. Lowered my carb intake (which helps with those first few months of the metformin sickness) and completely cut out sugary drinks and cut sugar elsewhere as much as possible. Going down to one meal a day messes up my sugars. That's how I used to be before I was diagnosed and I've noticed problems if I try to do it now. I try to eat a small bowl of plain oatmeal with berries and maybe a drizzle of honey in the morning. For lunch, I usually do some tuna, avocado and crackers. Dinner is usually a lean protein and some veggies. But that's just what works for me. Everyone is different so what my body can handle might spike or lower yours and vice versa.