Cut the tops of the tomatoes and seed with a spoon to hull them completely of seeds and liquid. Season the inside of the tomatoes with salt and pepper.
Place parsley in a food processor. Add garlic, lemons zest, red pepper flakes, salt, rosemary almonds, vinegar and oil to the processor. Pulse grind the mixture to combine.
Stuff 1/4 of the gremolade into each tomato and serve.