Heat oil - add jeera let it crackle. Add onion saute till it becomes transparent, then add capsicum, sauté for 2 mins.
Add garam masala powder and required salt. Saute for 3-5 mins in low flame. Set aside to cool.
Heat the dosa tawa, I used my square tawa. You can use normal dosa tawa and make small round thick dosas too. Make the dosa, drizzle oil.
Cook covered, do not flip. Once the top is cooked, remove the dosa from flame. Make 4 dosas likewise and let it to cool for few minutes.
Now get ready with the prepared dosa, green chutney, prepared capsicum stuffing and cheese for assembling.
First spread the green chutney on the dosa, then add the capsicum stuffing over it.
Sprinkle cheese over it. Close with another dosa and press it firmly for sealing.
Prepare the sandwich maker as per the instruction manual. Grease the grilled sandwich plates with butter.
Grill it for 5mins or until you see grill marks.
Remove, cut and serve Dosa Sandwich hot!