Heat oil in a large nonstick skillet over medium-high heat. Add broccoli, onion, and bell peppers; sauté 4 minutes. Add mushrooms, chile, cumin, and chili powder; sauté 2 minutes. Add tomato juice; cook 2 minutes or until slightly thickened. Remove from heat; stir in minced cilantro and lime juice, and set aside.
Divide black beans evenly among tortillas; top each with 1/2 cup broccoli mixture and 1/4 cup cheese. Fold tortillas in half, and place on a baking sheet. Bake at 375° for 5 minutes or until cheese melts. Serve with lettuce, salsa, and sour cream.