Cut chicken into bite-size pieces.
In a large bowl, add the chicken, spices, and yogurt. Stir to coat the chicken and allow to sit while you cook the onions.
In a skillet, heat 1 tablespoon of oil and sauté onions and garlic until the onions are translucent.
In your freezer bag or container, combine tomatoes, sugar, onions, and garlic.
Add marinated chicken slowly to the tomato mixture, including as much yogurt and spice marinade to the container as possible.
Seal the container completely and label it. Store masala curry in your freezer for up to 6 months.