Hi, I started following the Bernstein diet shortly after I was diagnosed and it's been a year now. My approach is slightly looser as I eat up to 50g of carbs a day and some of the foods that are on the no-no list. You learn the rules then bend them. For insulin, I take ActRapid (short-acting or regular) and NovoRapid (fast-acting). Because I don't like to waste insulin and I have NovoRapid for corrections, I use it to dose for the carbs as well. Either would work here, providing you pre-bolus. I dose with regular at 50% for the protein at 1u:15g. For anyone reading this please note that these are my ratios and yours are likely to be different. With insulin it's better to take too little than too much, so be very careful and get medical advice before adjusting your insulin doses.
I have three meals a day with 0g-20g-20g carbs per meal. For breakfast, I have two eggs and 40g of cheese and take 4u of regular insulin. Most of this is to offset feet on the floor when getting out of bed. At any other time of the day, I'd take half of the insulin for this meal. Unless I wake up low, I never have carbs in the morning. For lunch and dinner most days, I have 200-300g of vegetables and 150-200g of meat.
A typical lunch would be chicken or pork and a salad with avocado and olive oil for extra fat. I pre-bolus for 20g of carbs with 2.5u 15-30 minutes before eating. I dose for the protein when I finish eating and if it's less than 40g I take it in one shot. If the cut of meat is very fatty like pork belly I wait longer after eating before taking insulin, up to an hour and a half.
For dinner, I often have stir-fry, stew or curry. I just skip the typical side dishes and have some extra vegetables. I often have 50g of protein with dinner, and take a split bolus dosing twice for the protein giving the second dose more than an hour after eating. In the beginning, when I took it all in one shot I would have a lot of hypos. I'm also really careful with taking insulin for protein if I'm having alcohol with a meal.
While this sounds a bit tedious it's become second nature and it's just something I do. Because I'm drip-feeding the insulin in small doses I don't have too many hypos and my last HbA1c's are in the low and mid 30's. It's an excellent way to control blood glucose but I get that this way of eating is not for everyone. My boyfriend went ketogenic for a few weeks and he was super depressed by the end of it. I thought he was going to top himself when he had to eat curry without naan or rice. It's possible to get decent diabetic control without going ultra low carb and the most important thing is to find a diet that's sustainable for you.