Darn it,
I spent an hour working out a response to you, got distracted by a four letter word (work), did some editing, and submitted it, and it got lost in the ether. Just goes to show what a pain work can be.
Firstly, let's have a look at your meal.
There are approximately 29g of carbs in 1/2 tin baked beans (11.4.g of which are sugar). Beans have a low GI (48) which means they will take longer to digest and convert into glucose, 32g of carbs in 100g of oven chips (of which only 0.6g of which are sugar). Potatoes have a high GI which means they are more easily digested and converted into glucose.
From a carb perspective, the chips and beans constitute 1/3 of the low end of a high carb diet, 20% of the carbs you ate were sugar. Eventually all carbs, after they have been digested, convert to glucose.
Personally, I would look at the
Glycemic Index and
Glycemic Load of the carbs. You can find a GI database
here (it is an Australian database, so not all our brands will be found in it). In summary GI is meant to be a measure of how long it takes to digest the carbs found in a food, the higher the GI value, the quicker it takes to digest. GL is intended to allow us to change the types of carbs we eat by putting emphasis on portion size.
I would consider swapping out the chips with something lower GI (or reducing the portion size - and adding something with a lower GI).
I have found squash raises my BG to higher levels than I am happy with.
If its any consolation, chocolate is low GI
Regards, Tubs.
Edited to make the links easier to see