How to cook fall-off-the-bone beef spare ribs in oven or on stove top?
I've done Alton Brown's method for both spare ribs and baby back ribs, with good results.

Basically, you bake 'em in a low (250°F) oven in an aluminum foil packet with liquid for a few hours (2.5hrs for baby back, a little longer for spare ribs) completely untouched , then put 'em under the broiler at the end.