1.Melt butter in medium saucepan, stir in spices and flour; cook, stirring, over medium heat until mixture bubbles. Remove from heat, gradually stir in milk; stir over heat until mixture boils and thickens. Remove from heat, stir in cheeses until smooth; stir in onion, season to taste. Cover sauce, refrigerate about 3 hours or until firm.
2.Make mint salsa. Blend or process ingredients until smooth.
3.Place extra flour and breadcrumbs in separate medium shallow bowls. Beat eggs lightly in another medium shallow bowl. Drop rounded teaspoonfuls of cheese sauce into flour, coat lightly; shake off excess. Dip in egg, then in breadcrumbs; place on tray. Cover; refrigerate 30 minutes.
4.Heat oil in wok or deep, wide saucepan to 180°C/350°F. Deepfry fritters, in batches, until golden brown; drain on absorbent paper. Serve fritters with salsa.
Make sure the oil for deep frying is very hot, only deep-fry the fritters for a few seconds, or they will break open.Note