Wash and then dry your half an onion and tomatoes.
Chop your onion into small, thin slices. After you have removed the pulp of each tomato, chop your tomatoes into small, thin slices as well.
Add the tomatoes and onion slices to a mixing bowl.
Next add the cumin, flour, paprika, parsley and salt (optional) to the mixing bowl. Mix thoroughly.
Place the oil in the frying pan, which should be set on a high heat.
Once the oil is starting to bubble, scoop out about 3 tablespoons worth of the mixture onto the pan flattening it with your spatula to make one fritter. Try to fry 3-4 fritters at one time.
Fry the batch of tomatokeftedes for 3 minutes. Then flip them over and fry for 1 minute.
Using the spatula, transfer the batch onto a plate.
Repeat steps 5-8 until you have no more mixture left in the mixing bowl.
Enjoy!