I started my cake-making adventure lately, and the first, most basic cream used to ice the cake is the buttercream — it's very simple, and makes a delicious, thick and stable cake cream that you will love!
As you can see in the recipe image, I used it already in my vanilla butterscotch cupcakes, which got rave reviews from my friends and coworkers! :-) Unfortunately the cream alone is rather not spectacular, just a sweet, delicious blob of butter and sugar ;-)
Tuna paste is ridiculously easy to prepare and makes a great no cooking bento, cutting the preparation time to less than 20 minutes, including rice cooking time! Now, that's what I would call cooking on the go! You can also use the tuna paste for a great tasting onigiri or sushi.