Wait... 4 bananas is a glycemic control disaster. 2 mandarins is OK, but now 4 bananas. Where is the protein? where is the fat?
I know CGMs themselves are expensive, but you can get helpful free info by subscribing to updates from CGM companies. I am subscribed to Levels and Nutrisense. Say, I learned to either pair oatmeal with an omelette or substitute oatmeal with seeds cooked in almond milk from the information I received. They provide their tips based on statistical data they gather from their users who wear CGMs. It is not personalized to YOU, but it is still useful.