TheFork users who ate in Almancil have said really good things about New Fat Frog, Le Marquis and Rumaria - Fusão Ibérica. Maybe you should give them a try!
Some of the more popular Fusion restaurants where you can go with your family in Almancil according to TheFork users include:
New Fat Frog, with a 9.1 rating
Le Marquis, with a 9.6 rating
Rumaria - Fusão Ibérica, with a 9.1 rating