Pork Ribs with Oregano and Coriander Yogurt

Name: Pork Ribs with Oregano and Coriander Yogurt
Ingredients: Coriander yogurt; 1 cup whole milk greek yogurt; 1½ tablespoons ground coriander; 1 teaspoon fresh lemon juice (about ¼ small lemon); 1 teaspoon extra virgin olive oil; 1 teaspoon kosher salt; Ribs; 1 rack baby back ribs (about 2 pounds); 5 tablespoons extra virgin olive oil, divided; Kosher salt; ¼ cup dried oregano; ¼ cup ground coriander seed; 1 medium yellow onion, thinly sliced; 7 garlic cloves, sliced; 6 ounces smoked slab bacon, diced (about ¾ cup); 4 sprigs fresh thyme; 1 bay leaf; 1 quart chicken stock; 1 quart pork stock (you can substitute additional chicken stock); 1 lemon, juiced; Flaky sea salt (such as maldon)