Fried zucchini is one of my favorite summer foods, as it's easy to make, has little mess & effectively uses up garden surplus. I start by putting flour and crumbed club crackers into separate ziplocs and beating together egg, buttermilk & S&P (1 part milk to 2 parts egg). How much of each ingredient depends on how much zucchini you have; a cup of flour, a sleeve of crackers and an egg is enough to do 1 moderate size zuch.
Heat up a large skillet and use your preferred frying liquid. I use butter, lots and lots of butter :-) Put the slices in once the pan's hot enough for them to sizzle right off and keep the heat around medium. Don't bother'em, just let'em cook. Once they're brown on one side, flip and repeat. Should take about 15 minutes depending on the thickness of the slices. Plate & serve. Be careful with larger zuchs, the larger seeds seem to store heat & can really burn.
Mine are simple, I'm sure you could add Tabasco sauce, chili powder, paprika, etc to liven up the taste. Consider this as a good starting point for a summer classic & enjoy.