Place a medium-large pot of water over high heat, and add a good amount of salt so that it tastes like sea water; squeeze in the lemon and stir to combine, and bring to the boil.
Once the water boils, add in the asparagus, and blanch them for about 30 seconds – 1 minutes; remove from water and plunge into an ice water bath to shock the asparagus and stop if from further cooking, then drain and pat dry with paper towels.
Prepare your breading area by getting your flour ready in one bowl or container, your whisked eggs in another, and the panko breadcrumbs combined with the parmesan in another.
Dip the asparagus spears into the flour to coat, then into the eggs, then into the panko-parmesan mixture to coat; set aside on a large platter, and repeat until all are coated.
Heat enough oil in a large skillet or pan to generously cover the bottom (enough for shallow frying), and once hot, begin adding batches of the coated asparagus spears and fry, turning them once, until golden-brown and crisp; drain on wire racks, and repeat with all coated asparagus; sprinkle with a bit of paprika to finish.
Serve with the Lemony Sun-Dried Tomato Aioli sauce.