@Jimmy2202 what are you trying to achieve with your slice of toast?
If you are trying to raise your blood sugars to a level you are confident you will not hypo during the night, you will need carbs not protein. Cheese is not going to helpful and nuts may be too low carb.
If the toast works, I would make a note of how many carbs are in a slice and look for something with a similar amount of carbs.
@rebrascora raises the point about a banana being fast acting carbs. This is worth considering if you want your levels to rise slowly over the next few hours or raise faster. Personally, I would rather raise my levels faster so I can go to sleep with more confidence.
I would also think about why you are not confident to go to sleep with levels around 6. If you have no “insulin on board” (bolus within the last 4 hours), your basal should hold your levels stable throughout the night and you have a 2mmol/l tolerance if they drop slightly.
If you find you need to be higher than 6 to avoid a hypo, you may benefit from a basal test as your basal dose may be too high if your levels fall when you are not eating, drinking or exercising.
We are all different. So you need to find what works for you and makes you feel comfortable when going to sleep. Higher levels, faster carbs, …