I think it depends on the individual. Bernstein is a T1, I'm T2, so I'm still making insulin and I appear to have a good second phase insulin response. What is in my shopping trolley is different to what is in Bernstiens shopping cart.
If you really want to know what to eat, you need to test, test, test! Even a microscopically small portion of pasta sends my BS up to high levels for hours. However, if I'm planning to do some heavy exericse after eating it, I might risk that small portion, once in a while. We are all different.
My can't do without things are now probably eggs and blueberries and almonds and Lid's greek yoghurt. My fridge almost always has lots of lemons and limes for salad dressing, along with nice olive oil. But I really couldn't do without hummus - higher in carbs than some people tolerate but chickpeas don't make me spike, thank goodness.