Member Samantha A. loved De Fontein Belgian Beer Cafe - Mission Bay over 1 year ago Mussel Mondays Great deal 2 for 1 Monday's. If you love mussels then this is the deal for you, huge 1kg of mussels with fries. Great deal and delicious. Comment 1 0 Disagree 0 Agree Please log in or register to leave a commentand/or click agree or disagree. 1 comment Graham P. over 1 year ago: Precisely, but if you are hungry and there are two of you, order with a double side of fries. Truly excellent value.