Begin by slicing large yellow or sweet onions into ½-inch thick rings, separating each ring.

In a mixing bowl, combine softened cream cheese, shredded sharp cheddar, minced jalapeños, and optional add-ins. Stir until smooth and chill for 10 minutes.

Fill each onion ring with the cream cheese mixture, packing it generously, and place on a parchment-lined tray.

Freeze stuffed onion rings for 20-30 minutes to firm up.

Set up three shallow dishes: one with flour, another with beaten eggs, and the last with breadcrumbs. Coat each onion ring in flour, dip in egg, and roll in breadcrumbs.

Heat oil to 350°F (175°C), add breaded onion rings in batches, frying them for 2-3 minutes per side until golden brown.

Transfer fried rings to a paper towel-lined plate to absorb excess oil and serve hot with dipping sauces.