Smothered Beans with Leeks and Collard Greens

This is what we're having for dinner tonight with the leeks and collard from the farm. This is also good for lunch the next day.

Smothered Beans with Leeks and Collard Greens

1 cup dried Great Northern beans (or use 1 can of great northern or cannellini beans)
1/4 cup dried pinto beans
1 quart water
2 tablespoons olive oil
2 cups thinly sliced leeks (about 2 large)
1 tablespoon chopped fresh or 1 teaspoon dried oregano
1 1/2 teaspoons sea salt, divided
3 garlic cloves, thinly sliced
1 pound collard greens, chopped
1/2 teaspoon freshly ground black pepper
1 (14.5-ounce) can no-salt-added whole tomatoes, undrained and chopped

Sort and wash beans; place in a large saucepan. Cover with water to 2 inches above beans; cover and let stand 8 hours. Drain beans. Add 1 quart water and return beans to pan. Bring to a boil over medium heat. Reduce heat, and simmer, partially covered, for 30 minutes. Cool. Drain beans in a colander over a bowl, reserving cooking liquid; set beans aside. Add enough water to cooking liquid to equal 3 cups; set aside.Heat the oil in a Dutch oven over medium-high heat. Add leeks, oregano, 1 teaspoon salt, and garlic; sauté 5 minutes or until leeks are tender. Reduce heat to low; cover and cook 10 minutes, stirring occasionally. Transfer leek mixture to a large bowl; add greens. Toss well to combine.Place half of greens mixture in bottom of Dutch oven; top with beans. Spread remaining greens mixture over beans. Sprinkle with 1/2 teaspoon salt and pepper. Pour reserved liquid over greens. Cover and simmer over medium heat 1 hour or until beans are tender, stirring once. Uncover and stir in tomatoes; simmer 10 minutes.