To prepare steak, heat 1 1/2 teaspoons oil in a large Dutch oven over medium-high heat. Add half of meat; sauté 8 minutes or until browned. Remove from pan. Repeat procedure with 1 1/2 teaspoons of oil and remaining steak. Return steak to pan; stir in onion and next 5 ingredients (through tomato sauce). Bring to a boil; cover, reduce heat, and simmer 20 minutes or until meat is done. Keep warm.

To prepare mofongo, place plantains and 1/2 teaspoon salt in a large Dutch oven. Cover with water to 1 inch above plantains; stir to dissolve salt. Let stand 20 minutes. Drain plantains, and return to pan. Cover plantains with water to 1 inch above plantains. Bring to a boil over high heat. Reduce heat, and simmer 20 minutes or until tender. Drain plantains; return to pan. Mash plantains with a potato masher. Stir in 1 1/2 teaspoons salt, garlic, and broth. Shape plantain mixture into 24 (1/2-inch-thick) patties.
Heat 2 tablespoons oil in a large nonstick skillet over medium-high heat. Add 8 patties; cook 3 minutes on each side or until browned. Repeat procedure twice with remaining patties and oil. Serve meat mixture over patties.