In a large skillet, heat olive oil over medium heat. Add onions, 1/2 teaspoons salt, and caraway seeds and cook for 10-15 minutes until onions are softened and begin to brown. Stir in Dijon and beef broth; cool for an additional 2 minutes. meanwhile, sprinkle black pepper nad 1 teaspoons salt generously over both sides of the steaks. Grill or broil to desired doneness.
Place steaks on serving dish and garnish with cooked onions and slices of blue cheese. Serve with steamed baby spinach.