I would suggest two separate sites for you to visit. The first is a site that offers recipes and a meal plan: www.bestdiabeticrecipes.com/. The second site will help you learn how to eat a healthy diet for diabetes: www.heart.org/.../Diabetes/DiabetesToolsResources/
WebMD offers a diabetic meal plan at http://diabetes.webmd.com/guide/sample-meal-plan. The American Diabetic Association also offers a planning guide for meals at http://www.diabetes.org/food-and-fitness/food/planning-meals/.
The first, 잘 먹겠습니다, means something along the lines of "I will eat well." It's what you say before a meal or when you receive a meal. The second, 잘 먹었습니다, means "I ate well." You say this after the meal.
Yes a proper meal should be created and served by the same person, unless the meal is being served buffet style. However, if the guest(s) offers to help, it is acceptable for them to assist the maker of meal serve it.
Diabetes.org offers a great meal planner on their website. You can make your own menus and they offer lots of help. Diabetes.org also offers tips and tricks to help make your life a little bit simpler.
The word antipasti means "before the meal". It is the first dish served. A traditional Italian meal would start with an antipasto, then primo piatto (first dish), secondo piatto (second dish) and contorno (side dish) and finally, dolce (dessert).
There are many popular and effective diabetes meal planning options. Try finding some diabetes cookbooks and websites. WebMD also offers a good meal planning guide at http://diabetes.webmd.com/features/4-systems-for-diabetes-meal-planning