How to Make It
Preheat grill to medium-high (about 450°F).
Combine coriander, black pepper, and 1/2 teaspoon salt in a bowl. Rub steak with 1 tablespoon oil and spice mixture. Coat grill grate with cooking spray. Add steak to grill; cook 5 minutes on each side for medium-rare or until desired degree of doneness. Place steak on a cutting board; let stand 5 minutes. Cut across the grain into thin slices.
Heat remaining 1 tablespoon oil in a medium skillet over medium-high. Add onion and bell pepper; sauté 3 minutes. Stir in tomato paste and cumin; cook 30 seconds. Add remaining 1/2 teaspoon salt, stock, vinegar, and beans; cook 3 minutes. Stir in cilantro. Serve with steak.