Put the onion in a small pan with the oil and cook gently until sweet and translucent. Set aside to cool.
Crumble the feta and goat cheese in a bowl and add the onion, mint, eggs, and flour. Mix well until everything is combined. Place in the fridge for 30-40 minutes to firm up.
Put the sesame seeds and flour on a plate.
Take 1 tablespoon of the cheese mixture in your hands. Roll into a ball and then toss in the sesame-flour mixture. Repeat until all the cheese mixture is used up.
Heat the oil in a pan over medium heat. Check that it is hot enough by dropping a tiny bit of the cheese mixture- the oil should immediately start bubbling around it.
Lower the cheese fritters gently into the hot oil and cook until golden and crispy on all sides. Remove from the oil using a slotted spoon and place on paper towels for a few seconds to absorb the excess oil.
Serve with thyme honey drizzled all over. Eat immediately.