If you eat the same meal often, you can create a custom saved meal, making it faster to log the next time you eat it.
To create a saved meal from any meal on your daily log:
Tap the ... button next to the meal name
Tap "Save Meal"
Rename your meal as necessary
Tap the checkmark in the top-right corner when you're done.
This will create a copy of this meal in your Saved Meals for fast logging moving forward.