Turmeric and Ginger Spiced Cabbage and Peas

Name: Turmeric and Ginger Spiced Cabbage and Peas
Ingredients: 5-6 cups chopped Cabbage; 2 cups frozen Peas; 1 piece large Onion, finely chopped; 3 pieces Green chillies, finely chopped (adjust to taste); 2 pieces 2 inch piece of Ginger, finely chopped; 1 tablespoon Turmeric powder; 1/2 tablespoon Ginger powder; 1 tablespoon Garam Masala (Mixed Spice); 1/2 tablespoon Cumin seeds; 1/2 tablespoon Coriander powder; 2 tablespoons Grapeseed oil (or any non-fragrant cooking oil); 1 cup Crushed tomatoes; 1 tablespoon Salt (adjust to taste)