You can either make the masala at home, buy it from a store or use any Indian pickle. Here's how you can make it at home: Dry roast dried red chilies, kalonji (onion seeds), coriander seeds, fennel seeds, mustard seeds, fenugreek seeds, and cumin seeds till slightly browned and they release an aroma.  Then grind them fine and store this spice blend in an airtight container. Use it in any recipe like this.  You can substitute achari masala or pickle with garam masala. The flavors will not be the same though.