1. Heat oil in stockpot over medium heat until hot. Press cumin evenly onto all surfaces of beef roast. Place roast in pot and brown evenly. Pour off dripppings.
2. Season roast with salt and pepper; add salsa.
Bring to a boil. Reduce heat and cover tightly.
Simmer 2 1/2 to 3 1/4 hours or until fork-tender.
3. Remove roast; keep warm. Skim fat from cooking liquid. Stir in beans and corn; bring to a boil.
4. Reduce heat and simmer, uncovered, 8 to 10 minutes or until liquid is slightly thickened. Carve roast into thin slices and serve with bean mixture. Serve over rice if desired.