As you may recall Babybear has enjoyed tuna mayonnaise sandwiches in the past, the only downside of which was that she honked rather badly of fish until it came to bath time.
She also likes hummous sandwiches, cheese sandwiches and controversially, hummous and cheese sandwiches. I'd also highly recommend mixing grated carrot with hummous as it holds together nicely. If I'm making these for myself I'd drop some sultanas into it but I haven't done that for Babybear yet as I'm wondering if disguising secret choking hazards in hummous is the way to go. It will probably be fine, really, as Babybear has yet to eat a sandwich without fully dismantling it first, smushing the filling into her face and then addressing the slices of bread. Ham is a trickier option, given her technique as it has a tendency to stick to the bread.
She also enjoys avocado but it's not convenient to take out with us as it goes brown which I personally find aesthetically unappealing. Philadelphia is good, but a little boring I think.
So…anyone else? There must be loads that I'm just not thinking of.