Method for production of frozen vegetables or fruits
The present invention relates to a method for producing frozen and dehydro-frozen vegetables and fruits, wherein the method includes the method of cryogenically freezing the fruits or vegetables.
1. A method for making a frozen food product, the method comprising:
obtaining an amount of a raw fruit, raw vegetable, or combination thereof, wherein the raw fruit or raw vegetable comprises at least about 90% moisture by weight;
air drying the raw fruit, raw vegetable or combination thereof to reduce the total moisture level of the raw fruit, raw vegetable, or combination thereof by 25% to 60% thereby producing a partially dried product comprising about 75% or more moisture by weight; and
cryogenically freezing the partially dried product to produce a frozen food product;
wherein the cryogenically freezing provides a frozen food product that comprises a frozen food product with a crispness similar to a fresh product when the frozen product is thawed at ambient conditions.
2. The method of claim 1 , wherein said raw fruit, raw vegetable or combination thereof comprises a mesocarp.
3. The method of claim 2 , wherein said raw fruit, raw vegetable or combination thereof is selected from a group consisting of bell peppers, jalapeno peppers, Anaheim peppers, tomatoes, grapes, peaches, melons, and apples.
4. The method of claim 1 , wherein the cryogenically freezing step comprises freezing the partially dried product mechanically.
5. The method of claim 1 , wherein said raw fruit, raw vegetable or combination thereof is selected from a group consisting of lettuce and cabbage, bell peppers, jalapeno peppers, Anaheim peppers, tomatoes, carrots, broccoli, celery, onions, cauliflower, green beans, grapes, peaches, melons, and apples.
6. The method of claim 1 , wherein said method is a continuous process.
7. The method of claim 1 , wherein the drying step is conducted long enough to remove said moisture but not to shrivel the product or cause a loss of crispness.
8. The method of claim 1 , wherein the raw fruit, raw vegetable or combination thereof is dried at a temperature of from about 200° F. to about 300° F.
9. The method of claim 8 , wherein the raw fruit, raw vegetable or combination thereof is dried for from about 15 minutes to about 45 minutes.
10. The method of claim 1 , wherein the partially dried product is cryogenically frozen at temperatures of approximately −321° F. in liquid nitrogen.
11. The method of claim 10 , wherein the dried product is cryogenically frozen for about 1 minute.
12. The method of claim 1 , further comprising blanching the partially dried product prior to cryogenic freezing.
13. The method of claim 1 , further comprising treating the partially dried product with CaCl 2 prior to cryogenic freezing.
14. A cryogenically frozen food product comprising a partially dried raw fruit, raw vegetable, or combination thereof that has been cryogenically frozen, wherein the cryogenically freezing provides a frozen food product that comprises a frozen food product with a crispness similar to a fresh product when the frozen product is thawed at ambient conditions and wherein the raw fruit, raw vegetable, or combination thereof comprised at least 90% moisture by weight before being partially dried and the raw fruit, raw vegetable or combination thereof comprises a reduced total moisture of between 25% and 60% after being partially dried wherein the partially dried product comprises about 75% or more moisture by weight.
15. The cryogenically frozen product of claim 14 , wherein said raw fruit, raw vegetable, or combination thereof comprises a mesocarp.
16. The cryogenically frozen product of claim 15 , wherein said raw fruit, raw vegetable or combination thereof is selected from the group consisting of bell peppers, jalapeno peppers, Anaheim peppers, tomatoes, grapes, peaches, melons, and apples.
17. The cryogenically frozen product of claim 14 , wherein the partially dried raw fruit, raw vegetable, or combination thereof comprises about 75% or more moisture by weight.
18. A method for making a frozen food product comprising:
obtaining an amount of a raw fruit, raw vegetable, or combination thereof, wherein the raw fruit or raw vegetable comprises at least about 90% moisture by weight;
osmotically drying the raw fruit, raw vegetable, or combination thereof to reduce the total moisture level of the raw fruit, raw vegetable, or combination thereof by between 25% and 60% thereby producing a partially dried product comprising about 75% or more moisture by weight; and
cryogenically freezing the partially dried product for about 1 minute or less to produce a frozen food product; wherein the cryogenically freezing provides a frozen food product that comprises a frozen food product with a crispness similar to a fresh product when the frozen product is thawed at ambient conditions.
19. The cryogenically frozen food product of claim 14 wherein the cryogenically frozen food product comprises a reduced total moisture of between 25% and 60%.
20. The method of claim 18 , wherein the partially dried product is cryogenically frozen at temperatures of approximately −321° F. in liquid nitrogen.
21. The method of claim 18 , wherein the dried product is cryogenically frozen for about 1 minute.
22. The method of claim 18 , wherein said raw fruit, raw vegetable or combination thereof is selected from a group consisting of lettuce and cabbage, bell peppers, jalapeno peppers, Anaheim peppers, tomatoes, carrots, broccoli, celery, onions, potatoes, cauliflower, corn, peas, green beans, grapes, peaches, melons, and apples.
23. The method of claim 18 , further comprising blanching the partially dried product prior to cryogenic freezing.
24. The method of claim 18 , further comprising treating the partially dried product with CaCl 2 prior to cryogenic freezing.