This idea of making powdered tomato is just easy to make in your kitchen. The resulting product is red in color and smells and tastes like fresh tomatoes. To cook, mix with water as needed.
How to make powdered tomatoes easily at home
1. Dip the tomatoes in boiling water for a minute.
2. Dip in 500 ppm solution of sodium metabisulfite for 2 minutes.
3. Dry in the oven at 54°C for 9 hours or until its moisture goes down to 7.5%.
4. Pulverize the dried tomatoes in a pestle.
Source: Selected R&D Completed Projects, NSTA 1982