Dehydrated Sautéed Vegetable Pieces Flavor Preservation
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Solution Overview
Problem
Existing methods for dehydrating vegetables from the genus Allium result in flavor and color profiles that differ significantly from freshly sautéed vegetables, with many producing a pronounced brown color instead of the desired pale white-yellowish-golden color.
Innovation Solution
A method involving fresh vegetable pieces from the genus Allium, combined with an oil component in a specific weight ratio, heated to 80-100°C for 3-80 minutes while maintaining a water content reduction of no more than 20%, followed by oil removal and dehydration at less than 98°C for at least 1 hour, achieving dehydrated sautéed vegetable pieces with a water activity of less than 0.5 and an oil content of less than 45 wt.%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dehydration methods are used on Allium vegetables, then dehydration efficiency is improved, but the flavor and color profile deteriorates (producing pronounced brown color instead of pale white-yellowish-golden)
Solution Approach 1:
The patent applies parameter changes by controlling dehydration temperature to be below 98°C and managing moisture content reduction to no more than 20% during heating. These parameter adjustments prevent excessive browning while maintaining dehydration efficiency, producing the desired pale white-yellowish-golden color profile instead of pronounced brown color.
Solution Approach 2:
The patent employs preliminary action by pre-heating the vegetable pieces in oil before dehydration. This pre-treatment step prepares the vegetables for dehydration by establishing the desired color and flavor profile in advance, ensuring that the final dehydrated product closely resembles freshly prepared sautéed vegetables.
2Speed
If high temperature heating is applied to dehydrate vegetables, then dehydration speed is improved, but desirable flavor notes are lost and excessive browning occurs
Solution Approach 1:
The patent changes the temperature parameter by maintaining dehydration temperature below 98°C, which is lower than conventional methods. This temperature control allows dehydration to proceed at adequate speed while preserving desirable flavor notes and preventing excessive browning that would occur at higher temperatures.
3Loss of time
If vegetables are sautéed at high temperature, then cooking time is reduced, but the color becomes too brown and flavor profile changes from fresh sautéed appearance
Solution Approach 1:
The patent applies parameter changes by controlling the heating temperature to below 98°C and limiting moisture content reduction to no more than 20% during the heating phase. These controlled parameters achieve adequate cooking while preserving the pale white-yellowish-golden color appearance characteristic of fresh sautéed vegetables, avoiding excessive browning.
4Productivity
If moisture content is reduced significantly during heating, then dehydration efficiency is improved, but texture and flavor preservation deteriorates
Solution Approach 1:
The patent employs preliminary action by limiting moisture content reduction to no more than 20% during the heating phase before dehydration. This preliminary control preserves texture and flavor while still achieving adequate dehydration efficiency in the subsequent drying step, maintaining the stability of the vegetable's composition.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces dehydrated sautéed vegetable pieces with excellent shelf life stability and rehydrated products that closely resemble freshly prepared sautéed vegetables in taste, texture, and appearance, minimizing excessive browning and loss of desirable flavor notes.
Implementation Method 1
heating the vegetable-oil combination to a temperature of 80-100°C for 3-80 minutes whilst ensuring that the water content of the vegetable pieces is reduced by not more than 20%
Implementation Method 2
dehydrating the heated vegetable pieces at a temperature of less than 98°C for at least 1 hour to produce dehydrated sautéed vegetable pieces having a water activity of less than 0.5
Data Source
AI summary
The present invention provides method of preparing dehydrated sautéed vegetable pieces, said method comprising: ⋅ providing pieces of fresh vegetable belonging to the genus Allium, at least 50 wt.% of said vegetable pieces having a weight of 0.05-5 g; ⋅ combining said vegetable pieces with an oil component in a weight ratio 1:25 to 20:1 to produce a vegetable-oil combination; ⋅ heating the vegetable-oil combination to a temperature of 80-100°C for 3-80 minutes whilst ensuring that the water content of the vegetable pieces is reduced by not more than 20%; ⋅ removing a part of the oil contained in the heated vegetable-oil combination and recovering the heated vegetable pieces; and ⋅ dehydrating the heated vegetable pieces at a temperature of less than 98°C for at least hour to produce dehydrated sautéed vegetable pieces having a water activity of less than 0.5 and an oil content of less than 45 wt.%. This method produces dehydrated vegetables with excellent shelf life stability. The dehydrated pieces can be rehydrated to produce vegetable pieces having very good taste and texture.