Rinse, split and thinly slice leeks. Remove core and thinly slice cabbage (about 6 cups). Julienne sage and snip chives. Fry bacon in 12-inch skillet over medium high heat until crisp (about 3 minutes); set bacon aside on paper towels. Reserve 2 tablespoons of bacon fat. Add garlic and leeks to skillet; cook about 2 minutes. Add cabbage, chicken stock and beans; gently toss until combined. Simmer until cabbage begins to wilt (about 3 minutes). Add bacon, sage and chives. Toss until well combined. Season to taste. Serve hot.