Right. You minraise him back because nobody ever ever folds to a minimum raise and you are stacking off no matter what cards hit anyway.

Pot is 22, you lead 15, he raises to 30, you raise to 45, he calls because he has to.

Pot is now 112, opponent has put in 56 and so has 79 left. You can bet just 30 on the turn and the last 49 on the river, it's very very tough for him to fold.

Actually, because of the flush draw I'm not sure I love this line: you might have to bet a bit more on the turn. But it's definitely better than the call and check it to him on the turn line, since if he has the FD he can take the free card.