The honeymoon period.

you should be waiting to see if the dose actually brings you back to normal once its finished as opposed to correcting between meals....

spikes can be reduced by increasing the time from injecting to when you eat....

the timing of a dose can all depend on the type of food your are having as well so you really need to get some testing done and write it all down.....

the honeymoon period is just another spanner in the works unfortunately and until its pretty much finished you can expect some unpredictable results...

There is a balance to be reached between the rate of absorption of fast acting insulin and the rate of consumption of carbs.
Unfortunately, the balance is not simple, not the same for all food and not the same for all people.
Typically, fast acting insulin takes about 4 hours to be completely absorbed but starts working after about 10 minutes (take a look at http://www.diabetes-support.org.uk/info/?page_id=408 to see different insulin profiles and the average rate at which they work).
Foods can take anything from minutes to hours to be consumed. For example, glucose, which we use to treat hypos, take about 10 minutes to affect our BG whereas something carby and fatty like a pizza could take 4 or 5 hours.
As a result, if we take our insulin at the same time as something which is fast to consume (this is called high glycaemic index, GI), the glucose will come out of the food into our blood faster than the insulin gets there and results in a BG peak.
If we take extra insulin at this stage (before the insulin we took with the food has a chance to fully act), we will end up with too much insulin overall resulting in a hypo.

To combat that, many people take their insulin before they eat. Trial and error helps them work out how much sooner for which foods.

As @novorapidboi26 explains, it is not a good idea to try to correct before the insulin has fully absorbed although some people (and meters) make an approximation of how much insulin should be in your body (insulin on board or IOB) and correct accordingly.

With the introduction of cheaper continuous-type BG meters, namely Libre, there has become an interest (some may even say, obsession) about having completely flat BG. Personally, I think this is incredibly difficult to achieve as a t1 and I expect the occasional reading above 10 an hour or two after eating some meals. If your readings are this high four or five hours after injecting, you may need to review your insulin doses.

In the honeymoon period this can happen because your Pancras is still making a little bit of insulin so your sugars can be off in this time

What was your reading before you ate though and more importantly when did you inject?
If your blood glucose is within range, try injecting between 10 and 20 min prior to eating.
10.8 after 4 hours may indicate that your ratio is slightly too low, you might need a bit more insulin with each meal
Or depending on what your BG was before you ate, it might be your basal that needs adjusting. Minefield!
I am still honeymooning 2.5 years post diagnosis in that my basal neeeds vary week on week, and I still only need realativley small amount of insulin and it’s a constant juggle, which is why I pay for the libre as without it I’d be up sh#t creek.
I’m also on a pump now which means I can administer tiny doses which works well for me.

I would say bolus 30 mins after because of the cheese slowing things down. Was it brown or white bread. I make my own brown and if that is eaten in isolation always bolus 30 mins after as the glucose release is so slow.