Pat zucchini slices dry and set aside.
Prepare three bowls: one with flour, one with beaten eggs, and one with breadcrumbs mixed with salt and pepper.
Heat about 1/2 inch of oil in a skillet over medium-high heat (aim for 350°F).
Dredge each zucchini slice in flour, then egg, then breadcrumbs, pressing the coating on gently.
Place 5–6 slices at a time into hot oil. Fry 2 minutes per side, or until golden brown.
Transfer fried zucchini to a wire rack or paper towel-lined plate. Repeat until all are cooked.
Serve immediately with marinara, garlic aioli, or ranch for dipping.