Combine cauliflower and lemon juice in a saucepan; add enough water to cover. Cook until just tender, 15 to 20 minutes. Drain and let cool, about 10 minutes.
Pour flour onto a plate.
Beat eggs in a bowl until smooth.
Mix bread crumbs, salt, and pepper in a shallow bowl.
Dredge each cauliflower floret in flour, dip in eggs, and coat with bread crumbs.
Heat oil in a deep-fryer or large saucepan. Fry cauliflower until golden brown, 2 to 4 minutes.
