In a Dutch oven, heat oil over medium-high heat. Add steak, basil, salt and pepper. Stir-fry until meat is no longer pink, 4-5 minutes; drain. Add garlic; cook 1 minute more., Stir in vegetables and picante sauce. Add broth; bring to a boil. Reduce heat; simmer, uncovered, until vegetables are tender, 15-20 minutes. Stir in beans; cook until heated through, 4-5 minutes. Add spinach; cook until just starting to wilt, 1-2 minutes.