The 29-year-old attacker had been considered a major doubt for the European Championship after being forced to undergo heart surgery last November, but he is now playing again.
The Azzurri boss visited Milanello in order to check up on the forward, who returned to action earlier in April after being sidelined since the tail end of October following an emergency heart procedure.
Cassano played a major role in Italy's qualification for this summer's tournament in Poland and Ukraine, so the fact that he is now working his way back to full fitness is, as Prandelli freely admits, a major boost.
"I can see that he is playing more and more, and that's important for a quality player like him," the former Fiorentina coach told Milan Channel. "I thing he's doing very well. I came here to see exactly that and I'm satisfied."
Cassano has made three substitute appearances for the Rossoneri since making his comeback in the loss to Fiorentina on April 7.
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