class Meal

public class Meal
{
public int MealId { get; set; }
public Recipe Recipe { get; set; }
}
    
public class Recipe
{
public int RecipeId { get; set; }
public string Name { get; set; }
public ICollection<RecipeItem> RecipeItems { get; set; }
}
    
modelBuilder.Entity<Meal>().HasOne(c => c.Recipe);