Final answer:
The safest method to thaw a frozen meat patty, according to USDA guidelines, is in the refrigerator, cold water, or microwave, keeping away from temperatures that promote bacterial growth. After thawing, the food should be cooked promptly.
Step-by-step explanation:
The safest method for thawing a frozen meat patty is by placing it in the refrigerator. This allows for slow and safe defrosting at a temperature that inhibits the growth of bacteria, which is typically at or below 4 degrees C (40 degrees F). Other safe methods include immersing the patty in cold water (changed every 30 minutes) or using a microwave for defrosting.
These methods ensure that the food is thawed at temperatures not conducive to bacterial growth, as recommended by the US Department of Agriculture (USDA). It's important to note that once thawed, foods should be treated like fresh perishables and cooked promptly to prevent bacterial growth.