Your recipes are stored within cookbooks in MasterCook on the computer, just like printed cookbooks. You can add your recipes to a menu or a meal plan.
A menu is a single course such as breakfast.
A meal plan is several courses over several days.
You can drag/drop recipes onto a menu or a meal plan.
You can double click on the "R" to the left of a recipe name in a meal plan to go to that recipe in your cookbook.
Below is a video that demonstrates how to add recipes to a meal plan and scale for number of servings.