Thinking, a spicy chile relleno casserole is probably not the right thing just post surgery...
http://www.mayoclinic.com/health/gallstones/DS00165/DSECTION=8
Something savory, as noddy suggested, sounds good. Thinking, just out of oven rolled biscuits made with cold butter (Joy of Cooking, or other recipes) with thyme, savory, or whatever herb thrown in the mix, in a basket with a cloth...
(simple ingredients, easy to do, you just need a rolling pin, or, I suppose, a straight sided wine bottle, can even use a glass to cut the "rounds") Beats all other biscuits, to me.