Final answer:
Some ingredients that could be not made in-house include tortillas and salsa. The availability of house-made ingredients can vary from one restaurant to another.
Step-by-step explanation:
In order to identify the ingredients in the tacos that are not made in-house, you would need to know which components are typically made from scratch in a taco restaurant. A common example of an ingredient not made in-house is the tortilla. Many restaurants purchase ready-made tortillas rather than making them from scratch. Another example could be the salsa or hot sauce used in the tacos. Restaurants often use commercially produced salsa rather than making their own.
It's important to note that the specific ingredients not made in-house can vary from one taco restaurant to another. Some restaurants may choose to make all of their ingredients from scratch, while others may rely on pre-packaged products. To determine which ingredients are not made in-house, you would need to ask the specific taco restaurant or review their menu and ingredient sourcing information if available.