Meanwhile, heat 1 tablespoon oil in a large skillet over medium heat. Add onion and cook, stirring, until it starts to brown, 2 to 3 minutes.
Add garlic; cook, stirring, for 1 minute. Stir in water, tomato paste and the remaining 1/4 teaspoon each salt and pepper.
Stir in chard, kale or spinach, cover and cook until tender, 3 to 5 minutes.
Stir in white beans and olives; cook until heated through, 1 to 2 minutes more. Remove from the heat.