Hi OP
You are young, you have great job which is secure for next 2-3 years at least.
You have less than 1 time annum salary in mortgage.
I'd say, take half of the saving offshore, to emerging markets and invest in more risky assets like: funds which are investing in stocks. Asia (China, Singapore), Eastern Europe (Poland).
They went through crisis very well, keeping PKB growth and they will be growing faster than old Europe in comming years.
Invest for 3-5 years in there, follow the news on economy in area where you're investing and check the status of investment itself once every week or two.
Last year return on some investing funds in Poland was around 100%.
If you were buying stock yourself it was really easy to earn 2-3 times that.
Rest put in bonds, just stay away from US$ just in case.
Just an idea to consider, based on info you gave in your post. Maybe talk about this with your advisor as well.