Heat a quart of salted water to boiling in a saucepan. Cook greens until softened, about 5 minutes; drain.
Return saucepan to stove top over medium high heat and once dry sauté garlic in 1 tablespoon of oil about 1 minute. Add raisins and olives and cook one minute more, stirring. Add greens and salt and cook, while tossing, 3 more minutes until heated through.
Remove from heat and stir in the remaining tablespoon of oil. May be served warm or at room temperature.