What is something celebratory that I can cook (on the stove) as a gift for someone who happens to be diabetic?

There are plenty of options. Last night I made Cajun chicken salad. The Cajun seasoning is no sugar and low carb on non depending on the brand. If you have a n oven. You could make zucchini lasagna. I always add meat to the sauce. Just look for a sauce low in sugar.