You might think that the obvious strategy would be to focus on dishes that earn the most coins and XP, but the time it takes your chefs to make dishes impacts your earnings.
Time is money
We wanted to know which dishes were the most profitable. Is it better to serve many cheaper dishes in a small amount of time, or better to server expensive dishes but take hours to make. The solution was to find out how much was earned per dish divided by the time it takes the chef to prepare it.
Let's use the Mexican chef as an example. It takes him 30 minutes to make a Taco, and after subtracting the cost of ingredients, each Taco nets 17 coins. In comparison, it takes him 2 hours to make Nachos, with a net profit after ingredients of 27 coins. If we can make 4 Tacos in 2 hours (4 x 30 minutes each) versus one serving of Nachos in 2 hours, we'd have a net profit of 68 coins (17 * 4) which gets us 41 extra coins.
Of course, that doesn't guarantee everyone will order Tacos. But if you combine a profit strategy along with the Quick Turnover table trick, you should definitely come out ahead.
Ingredient Availability Consideration
Making the most profitable dishes is a good strategy, unless the ingredient refill time is ridiculously long. For example, you have a dish that has shrimp as an ingredient. The dish has a high profit ratio (amount earned based on cooking time) but only two servings of the ingredient become available every 5 hours, there's no way to really turn a decent profit. Unless you use market expansion baskets on those ingredients.
So your strategy for this element should be to save your market expansion baskets for ingredients that are in your most profitable dishes and/or are used in several dishes by different chefs.
Dish Prep Time Consideration
Let's use Pasta Carbonara as an example. It uses three ingredients (Cream, Fresh Pasta, and Ham) and takes 2 hours to cook. But that's not including the time it takes to prep the ingredients if you don't already have them on hand. Cream uses two servings of Milk and takes the Milk Helper 20 minutes to make. Fresh Pasta uses one serving of Flour and one serving of Eggs and takes the Dough Helper 20 minutes to make. And! that doesn't include the refill time for each of those ingredients in the Market if they're still refilling (Flour - 2 min, Eggs - 8 min 20 sec, Milk - 6 min 40 sec, and Ham - 30 min). If your Market ingredients haven't refilled yet, and the Helper Chef ingredients also still need to be made, that could easily add another 50 minutes onto the 2 hour Dish time.