Coconut is a fruit and does have sugar. But it also has a lot of antioxidants and beneficial fats if not consumed in excess.
What do you think about coconut flour ?
Open this site, it can help you to prepare quick foods.
https://www.barilla.com/en-us/search/recipes?sort=relevance&pasta-attribute-range=pronto
This type of diabetes is generally an eating disease. I would see a good nutritionist for some hands-on advice, and read read read -- lots of books on eating to control blood sugar. There are also many supplements that have been used to control blood sugar, such as holy basil and cinnamon. But since you have to be in control of your blood sugar, you want to learn how to use them properly and an internet site isn't the best place to do that. As to your quick snack question, nuts are a good high protein food that won't mess up your blood sugar. Toasted seaweed snacks pack a whole lot of nutrition into some nice packages, but go for the ones flavored with spices -- many have a lot of sugar in them. You can make these yourself before you leave in a short amount of time. Seeds are also good high protein low sugar snacks. But again, the first thing I would do is read read read and you'll get a lot of ideas that way. A good place to look for good things to eat that doesn't use a lot of sugar are recipes from macrobiotic cooking and eating -- they use almost no cane sugar at all, though they do use some complex sugar such as barley and rice malt.
Also, even though you're married, it doesn't mean you both have the same dietary needs or reactions. If you're diabetic, for example, and your husband isn't, you obviously have very different dietary guidelines to follow. If you're ill in some way and your husband isn't, you either have to agree to eat as you have to eat or to not eat together, which isn't a terrible or uncommon thing.
Diagnosed with what? Is your husband healthy and at a good weight? It's hard to recommend anything when you haven't said in this post what you're trying to accomplish and whether there are foods you have avoid.