3 tenderloin steaks balsamic green beans Recipes

butter, divided, vertically sliced yellow onion, vertically sliced red onion, sliced shallots, garlic cloves, minced, fat-free , lower-sodium beef broth, green beans, trimmed, balsamic vinegar, salt, divided, beef tenderloin steaks, freshly ground black pepper

vegetable oil, thick beef tenderloin steaks (about 6 steaks), olive oil, balsamic vinegar or red wine vinegar, chopped fresh chives, orange juice, poppy seeds, green beans, trimmed, head bibb lettuce , torn into bite-size pieces, head red leaf lettuce , torn into bite-size pieces, mandarin oranges, drained, crumbled feta cheese (about 4 oz), coarsely chopped walnuts (about 3 oz), red onion, thinly sliced into rings