Final answer:
The legality of selling 'homemade' pickles in a restaurant depends on compliance with local health regulations and food safety laws, with proper sanitation, labeling, and food safety practices being key factors.
Step-by-step explanation:
The legality of selling homemade pickles that are soaked in a pickling solution for two days and then served in a restaurant depends on the local health regulations and food safety laws. The process of pickling is a way to preserve vegetables by creating an acidic environment that favors the growth of beneficial bacteria and suppresses harmful bacteria. The beneficial bacteria produce lactic acid during fermentation, increasing the acidity of the brine and preventing spoilage. If the restaurant complies with local health codes, including proper labeling, sanitation, and food safety practices, it is likely legal for them to sell homemade pickles as described.