Making one is arranging one - that's how you make a Charcuterie board, or smörgåsbord, or similar dishes with multiple basic ingredients or dishes. I bet OP even sliced the fruits and vegetables himself, which constitutes preparing a meal.

And as noted, there is no "prepared meal" tag in this subreddit so Homemade is the only one available:

• [Homemade] - Food you made. This includes food made from scratch, or food assembled from pre-made ingredients.