This recipe, from-scratch biscuits filled with things that would elevate them to Something Special, did not turn out well for me at all. The biscuits were very, very dry, and the innards never really came together into more that a sticky, sloppy mess. I'm not even going to share the recipe; I know we can find better elsewhere (such as right here). I'd fill these tender, flaky things with ham and Cheddar, maybe a little mustard or some apple butter if you wanted to take a slightly sweet route. I'd serve them alongside some kind of soup, maybe tomato soup or some asparagus soup. Because I don't think the biscuit sandwich idea is a bad one at all; it just needs to be executed properly.
The biscuit recipe I linked to uses margarine; the failed recipe I made yesterday used butter. You can substitute butter for the margarine if you like, but my husband's best biscuits use shortening, and I feel there must be something about that hydrogenated stuff that creates the best texture. Just don't eat them every day. Or all in one sitting.
[link href="https://landcruisers.info/Recipes/Tender-Flaky-Biscuits-Recipe" link_updater_label="external_hearst" target="_blank"]Tender, Flaky Biscuits
— Kim Walker