1.Spray large saucepan with cooking spray heat over medium heat until hot. Saute onion and garlic until tender, 3 to 4 minutes. 2.Add greens and water to saucepan heat to boiling. Reduce heat and simmer, covered, until greens are wilted and tender, about 5 to 8 minutes, adding more water if necessary. Season to taste with lemon juice, salt and pepper.